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Andreas Ringwald6/22/26, 9:30 AM
We review the motivation for the axion as a solution of the strong
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CP puzzle. We discuss benchmark axion models and present their predictions concerning
(i) axion couplings to the Standard Model and (ii) axion dark matter abundance.
We give an overview on the discovery potential of current and planned
axion experiments, reaching from direct production and detection
of axions in the... -
Sebastian Trojanowski6/22/26, 10:05 AM
An inelastic structure is a classic feature of many dark matter (DM) models arising from symmetry breaking, and investigating transitions between states with small mass splittings allows for the identification of unique, detectable signatures. While such inelasticity is a characteristic hallmark of well-motivated scenarios like Higgsino DM, it leads to particularly striking phenomenology in...
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ROBERT Brandenberger (McGill University)6/22/26, 11:10 AM
Cosmological inflation has become the standard paradigm of
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early universe cosmology. I will argue that this scenario, at least
when described at the level of an effective field theory, suffers
from serious conceptual problems. In light of these problems, I will
discuss a new and more consistent approach to early universe scenario
based on a proposed non-perturbative definition... -
Sara Pasquetti (Milan-Bicocca University)6/22/26, 11:45 AM
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Hiranya Peiris6/22/26, 2:00 PM
Next-generation cosmological surveys — LSST, Euclid, Roman — will be limited not by statistical power but by systematic uncertainties rooted in our understanding of galaxy populations. Photometric redshift calibration, intrinsic alignments, and baryonic effects on the matter power spectrum are all manifestations of the same underlying problem: cosmological inference requires an accurate model...
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Tessa Baker6/22/26, 2:35 PM
Recent combinations of BAO, supernovae and CMB data prefer cosmologies with an evolving dark energy equation of state, w(z), which crosses the phantom divide (w=-1). But parameterisations of w(z) are not, in themselves, complete physical models of dark energy.
In this talk we’ll ask: what kind of underlying modified gravity or dark energy models give rise to phantom-crossing behaviour?...
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philippe brax (CEA)6/22/26, 3:10 PM
Recent surveys suggest that dark energy could be dynamical and cross the phantom divide. This can be easily reproduced in scalar-tensor theories where
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matter couples to dark energy. This potentially leads to serious gravitational problems in the solar system which can be evaded thanks to screening. I will argue that
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Sally Shaw (University of Edinburgh)6/22/26, 4:15 PM
Despite overwhelming astrophysical evidence that approximately 84% of the matter in the Universe is dark and fundamentally distinct from ordinary matter, terrestrial experiments searching for direct interactions of dark matter particles have yet to observe a convincing signal. Over the past two decades, dramatic gains in experimental sensitivity have been driven by the development of liquid...
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Iacopo Vivarelli (Universita e INFN, Bologna (IT))6/22/26, 4:50 PM
This talk will review the status of direct searches for physics beyond the Standard Model at the LHC, from the mature Run 2 programme to the emerging Run 3 landscape and the prospects of the HL-LHC era. After a broad overview of established search programmes—including supersymmetry, dark matter, heavy resonances —the discussion will focus on what is genuinely new in Run 3: not simply increased...
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Francesco Benini6/23/26, 9:00 AM
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Miranda Cheng6/23/26, 9:35 AM
Simulating quantum field theories on the lattice is the most trustworthy first-principles way to study a theory. Computationally, this can be challenging when the lattice becomes large or when the theory approaches a phase transition. In this talk, I will first give a review of recent efforts to apply generative AI to this simulation task. Next, we turn to the question: what have these neural...
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Sakura Schafer-Nameki (University of Oxford)6/23/26, 10:10 AM
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Julien Lesgourgues (TTK, RWTH Aachen University)6/23/26, 11:15 AM
I will briefly review the currently confusing situation regarding cosmological bounds on the neutrino mass. In the future, there is a hope to clarify the situation by detecting the actual neutrino free-streaming effect in large-scale structures. In this regard, I will present a new method allowing to easily incorporate the scale-dependance of the growth factor induced by massive neutrinos (or...
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Florian Beutler6/23/26, 11:50 AM
Spectroscopic surveys map the three‑dimensional large‑scale structure of the Universe, providing precise tests of cosmic expansion and the growth of structure. The Dark Energy Spectroscopic Instrument (DESI) is a Stage‑IV experiment on the 4‑m Mayall telescope, using 5000 robotically positioned fibres to obtain spectra for more than 40 million galaxies and quasars over ~14,000 deg². I will...
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Andrew Yi (SLAC National Accelerator Laboratory)6/23/26, 2:00 PMContributed Talk
The QCD axion is a particle that has been postulated to be a solution to the strong CP problem and also a candidate for dark matter in the universe. The DMRadio suite of experiments is a resonant, lumped-element search that probes low mass axions below 1 $\mu$eV. To achieve the necessary sensitivities, the development of DMRadio involves high-field DC magnets of various geometries, tunable...
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Lucien Heurtier (King's College London)6/23/26, 2:00 PMContributed Talk
In this talk, I will present a non-perturbative framework that allows to track the dynamics of slow-roll inflation while consistently incorporating quantum corrections, based on an alternative functional renormalisation group (RG) approach. I will guide you through the derivation of a set of coupled Friedmann-RG flow equations governing the joint evolution of spacetime, the inflaton field, and...
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Adrita Chakraborty (AGH University of Science and Technology)6/23/26, 2:00 PMContributed Talk
We model a soft-wall type nonconformal holography to study the gluon saturation phenomena occuring in a deep inelastic scattering process. The gravity background has been considered as a nonconformal warped version of 5D AdS geometry. The warpedness is characterized by a deformation parameter with finite length dimension. To represent a highly boosted target nucleus, we introduce a...
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Ivan Esteban6/23/26, 2:00 PM
Neutrino oscillation measurements are entering a precision era, with many parameters being measured at the percent level. However, unknowns related to 3-neutrino effects remain. Determining these unknowns is important for open questions in, e.g., cosmology; but it is also key to test the global consistency of the framework and fully establish or break the 3-neutrino paradigm.
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In this talk, I... -
Matteo Martinelli (INAF - OAR)6/23/26, 2:00 PM
The recent baryon acoustic oscillation (BAO) measurements from the DESI collaboration have revealed a first hint towards a deviation from a cosmological constant, signaling a preference for dynamical dark energy. In this talk, we explore the deep theoretical implications of these observations for dark energy and gravitational physics. Utilizing a model-agnostic, non-parametric reconstruction...
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Xianguo Lu6/23/26, 2:15 PM
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20-kton liquid-scintillator detector designed to determine the neutrino mass ordering and perform precision measurements of neutrino oscillation parameters using reactor antineutrinos. Following the start of physics data taking in August 2025, JUNO has recorded its first reactor antineutrino sample and reported world-leading...
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Elisa Iris Marieni (University of Southampton)6/23/26, 2:20 PMContributed Talk
String islands are isolated points in the space of string vacua that have no moduli except the dilaton, enjoy rank reduction and lead to consistent pure supergravity theories. Asymmetric orbifold constructions are powerful tools that enable us to access these points in the moduli space that are inaccessible to more standard string compactification techniques. In this talk, we classify all...
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Benjamin Muntz (University of Nottingham)6/23/26, 2:20 PMContributed Talk
We present a new mechanism for addressing the cosmological constant problem based on global constraints arising from a lapse function in a higher-dimensional gravitational theory. Inspired by Horava-Lifshitz gravity, we consider a 5d spacetime with anisotropic scaling along a compact extra dimension, while preserving Lorentz invariance in four dimensions. In the deep infrared limit, variation...
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Martin Teuscher (LPSC Grenoble, France)6/23/26, 2:20 PMContributed Talk
We consider the gravitational wave (GW) background induced by arbitrary source fields that are amplified during inflation. We first conduct a very general analysis where the associated tensor spectral index $n_T$ is shown to be given, under minimal assumptions, by a simple and ready-to-use formula. Remarkably, we demonstrate that during slow-roll inflation $n_T$ becomes completely independent...
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Junwen Xiong (Caltech)6/23/26, 2:20 PMContributed Talk
The SuperCDMS SNOLAB experiment is currently being commissioned at the Canadian underground facility SNOLAB. The experiment uses four detector towers that contain 24 detectors in total, including both interleaved Z-dependent Ionization and Phonon (iZIP) and high-voltage (HV) detectors with germanium (Ge) and silicon (Si) targets. The iZIP detectors measure both charge and phonon signals and...
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George Burton6/23/26, 2:30 PM
The Hyper-Kamiokande (Hyper-K) experiment is the third generation of underground water Cherenkov detectors in Japan. It will serve as (1) the far detector for a long-baseline neutrino oscillation experiment for the upgraded, 1.3 MW power J-PARC muon neutrino/antineutrino beam, and (2) a detector capable of observing proton decays, atmospheric neutrinos, and neutrinos from astronomical sources....
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Yengkhom Kalpana Devi (Bits Pilani Hyderabad Campus)6/23/26, 2:40 PMContributed Talk
In this paper, we explore modified gravity in the framework of $f(R, \mathcal{L}_m)$ theory by reconstructing the function $G(\mathcal{L}_m)$, where $\mathcal{L}_m = \rho$ be the matter Lagrangian, under the assumption of a pressureless, matter-dominated Universe. Using a non-parametric Gaussian process reconstruction technique applied to Hubble data, we present two cosmological models with...
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Dr JAVIER RUBIO (Universidad Complutense de Madrid)6/23/26, 2:40 PMContributed Talk
The Standard Model Higgs field, when non-minimally coupled to gravity, can display rich dynamics after inflation. In cosmological setups that include a short kination stage, the fast variation of spacetime curvature can temporarily destabilize the electroweak vacuum through curvature-induced tachyonic effects. This process can trigger a gravitationally sourced phase transition, leading to the...
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Peter McNamara6/23/26, 2:40 PMContributed Talk
SABRE is an international collaboration that will operate similar particle detectors in the Northern (SABRE North) and Southern Hemispheres (SABRE South). This innovative approach aims to distinguish potential dark matter signals from seasonal backgrounds: a pioneering strategy only feasible with a Southern Hemisphere experiment. SABRE South is located at the Stawell Underground Physics...
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Katarina Trailović (Institute Jožef Stefan)6/23/26, 2:40 PMContributed Talk
Path integrals in real time are plagued by violently oscillatory phases, and Lefschetz thimble methods offer one of the cleanest ways to make sense of them — but only if the intersection numbers between thimbles and the original integration contour can be computed reliably. In practice, existing approaches have been limited to just one or two variables, leaving genuinely multivariable problems...
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Karo Erhardt (KIT)6/23/26, 2:45 PMContributed Talk
The KATRIN experiment aims at direct kinematic measurement of the neutrino mass with the expected sensitivity below 300 meV (90% CL), performing a high-resolution, high-statistics spectroscopy of tritium beta-decay. To reach such sensitivity, the systematic effects, modifying the measured electron spectrum shape have to be modeled and controlled by dedicated calibration measurements.
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KATRIN... -
Leo Laschinger (MPIK, TUM)6/23/26, 2:59 PMContributed Talk
The KATRIN experiment is designed to measure the mass of the electron anti-neutrino by studying the high energy end of the tritium β decay spectrum. In addition, KATRIN is also a well suited instrument to explore the sterile neutrino hypothesis. The existence of sterile neutrinos would cause a kink-like distortion in the spectrum.
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Using the same datasets as for the active neutrino mass,... -
Halvor Melkild (University of Oslo)6/23/26, 3:00 PMContributed Talk
Strongly interacting dark sectors with pseudo–Nambu–Goldstone bosons provide a versatile framework for sub-GeV dark matter. While the original SIMP paradigm emphasises number-changing processes as the origin of the relic abundance, the phenomenology of pionic dark matter is considerably richer. Depending on the spectrum and couplings, the relic density can WIMP-annihilations,...
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Anish Ghoshal (University of Warsaw, Poland)6/23/26, 3:00 PMContributed Talk
Cosmological collider signals of primordial non-Gaussianity arise at tree level when a particle has Hubble mass during inflation. We critically review the formalism finding that a large class of inflationary theories, based on Planck-scale physics, predict a scalar bi-spectrum around the gravitational floor level. This mild signal arises for example in R2 gravity, in the regime where its...
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Prof. Nihan Katırcı (Dogus University)6/23/26, 3:00 PMContributed Talk
Recent cosmological observations continue to challenge the standard $\Lambda$CDM paradigm through persistent tensions in the Hubble constant $H_0$, the clustering amplitude $S_8$, and possible hints of nontrivial late-time dark-energy dynamics. In this talk, we discuss two complementary studies showing how sign transitions in the effective vacuum sector may arise naturally from modified...
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Khoi Le Nguyen Nguyen (DAMTP, University of Cambridge)6/23/26, 3:00 PMContributed Talk
Given a gauge Lie algebra, it is natural to seek representations for four-dimensional spacetime fermions that are anomaly-free and chiral. However, this problem is difficult to solve in full generality. Even for irreducible representations, where we only have to study $\mathfrak{su}(n)$ for $n\geq3$, solutions would seem to be few and far between: a trial-and-error scan by Eichten, Kang and...
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Svenja Heyns (Karlsruhe Institute of Technology)6/23/26, 3:12 PMContributed Talk
After completing 1000 days of data taking at the KATRIN experiment, the collaboration expects to reach a final sensitivity on the effective anti-electron neutrino mass below 300 meV. However, neutrino oscillation observations allow the value to be as low as 50 meV or 9 meV, depending on the neutrino mass ordering. Taking the next step in direct neutrino-mass searches includes probing the...
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James Hallam (Institute of Cosmology and Gravitation - University of Portsmouth)6/23/26, 3:20 PMContributed Talk
In this talk, we introduce Asymptotically Cubic Galileon gravity: a luminal Horndeski theory designed to remain close to the cubic Galileon over most of cosmic history, whilst allowing late-time departures that are be broadly consistent with current observations including the recent DESI results. These departures are generated by promoting the coefficients of the Galileon terms to functions of...
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David Alonso-González (IFT (UAM-CSIC))6/23/26, 3:20 PMContributed Talk
GeV-scale thermal dark matter is often considered to be strongly constrained by the null results of direct, indirect, and collider searches. Nevertheless, viable scenarios can still arise in well-motivated dark sector frameworks. In this talk, we explore this possibility in a dark Abelian Higgs model with a Dirac fermion dark matter candidate interacting with the Standard Model through a dark...
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Ethan Milligan (QMUL)6/23/26, 3:20 PMContributed Talk
Metastability of the Standard Model Higgs during inflation raises the possibility that stochastic fluctuations push the field beyond the instability barrier and into a region of negative energy vacuum. Whether such excursions are fatal to our Universe depends on their fully nonlinear gravitational evolution. We revisit this problem using numerical simulations of a spherically symmetric...
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Matteo Parriciatu (Università Roma Tre)6/23/26, 3:20 PMContributed Talk
We consider a new flavour framework in which quark mass hierarchies naturally arise from a small departure of the modulus VEV from special stabilised regions of genus 2. By extending the modular group to this genus, the same VEV can also account for the spontaneous breaking of the assumed CP symmetry. We present for the first time a quark model which is able to fit both the mass hierarchies...
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Luca Ferro (INFN Cagliari, University of Cagliari)6/23/26, 3:25 PMContributed Talk
For over three decades, the gallium anomaly, a persistent discrepancy exceeding 5σ between measured and predicted neutrino capture rates on gallium-71 in the GALLEX, SAGE, and BEST experiments, has challenged the particle physics community. While frequently interpreted as evidence for short-baseline sterile neutrino oscillations, this scenario is increasingly in tension with recent bounds from...
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6/23/26, 3:40 PM
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Giorgio Busoni (Adelaide University)6/23/26, 4:00 PMContributed Talk
Dark matter (DM) constitutes most of the matter content of the Universe, yet its particle nature remains unknown. While laboratory searches and cosmological probes have placed strong constraints on many candidate models, astrophysical environments provide a complementary avenue to test DM interactions under extreme conditions. Stars are particularly promising laboratories: as they move through...
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Enrico Specogna (University of Sheffield)6/23/26, 4:00 PMContributed Talk
In this talk we will look at the evidence of the effects induced by seemingly different extensions to the standard cosmological model in the cosmic microwave background (CMB) primary and secondary anisotropies: modified gravity (through the growth index - '$\gamma$', a modification of the growth of linear perturbations in the standard model, and the '$\mu-\Sigma$' framework, a modification of...
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Marco Carducci (Romatre university (INFN))6/23/26, 4:00 PMContributed Talk
We consider a modular-invariant SU(5) model supplemented, for the first time, by a spontaneously broken generalized CP symmetry. Therefore, CP violation originates solely from the vacuum expectation value of the modulus, whose real component acts as the unique source of CP breaking. In the lepton sector, neutrino masses are generated via a type I+III seesaw mechanism, thanks to a single...
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Shreya Girishkumar Pandit (University of Southampton)6/23/26, 4:00 PMContributed Talk
Description of quantum coupling is a universal problem appearing in many different fields (NMR, quantum computing, molecular and atomic physics,...). In particle physics, it applies to particle mixing, underlying neutrino oscillations and resonant particle production (applicable beyond these two) in different environments, of great importance in many BSM scenarios. I will discuss non-adiabatic...
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Oksana Iarygina (Nordita)6/23/26, 4:00 PMContributed Talk
Axions are well-motivated pseudoscalar fields that arise in many extensions of the Standard Model and can drive inflation. In scenarios where an axion couples to a gauge sector during inflation, the rolling field can lead to exponential amplification of gauge-field fluctuations, with important implications for particle production, reheating dynamics, primordial gravitational wave signatures,...
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Francesca Pucci6/23/26, 4:15 PMContributed Talk
The search for neutrinoless double beta decay (0νββ) is fundamental for investigating lepton-number violation, probing new physics beyond the Standard Model, and determining whether neutrinos are Majorana particles. CUORE, a cryogenic calorimetric experiment at LNGS, studies 0νββ in $^{130}$Te using 988 TeO₂ crystals, reaching a tonne-scale mass and operating below 15 mK. Since 2017, CUORE has...
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Patrick Adolf6/23/26, 4:20 PMContributed Talk
The latest data release of the DESI collaboration shows an increasing preference for time-depending dark energy models compared to the $\Lambda$CDM model.
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In our work, we construct a holographic dark energy model motivated by the work of Cohen, Kaplan and Nelson (CKN) which proposed to use the Hubble horizon as an IR cutoff and connect it to the UV cutoff of the theory.
We take the resulting... -
Maximilian Detering (King's College London)6/23/26, 4:20 PMContributed Talk
Dark matter (DM) decay in the Galactic halo injects energetic $e^\pm$ that can inverse-Compton scatter (ICS) solar photons into $\gamma$ rays, producing a diffuse halo of emission around the Sun. We present the first quantitative study of this signal as a probe of decaying DM. Using 15 years of Fermi-LAT solar-halo data, we compute the heliocentric ICS signal and derive limits on the DM...
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Gabriele Barca (University of the Basque Country)6/23/26, 4:20 PMContributed Talk
We present the formalism of Deformed Commutation Relations, consisting in a modification of the standard Heisenberg commutator (or of the Poisson brackets in the semiclassical limit) inspired by the Generalised Uncertainty Principle representation, and its implementation to the cosmological Friedmann-Lemaitre-Robertson-Walker isotropic model. One specific form had previously been shown to...
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Takafumi Aoki (ICRR, The University of Tokyo)6/23/26, 4:20 PMContributed Talk
Instanton effects in gauge theories with spontaneously broken gauge symmetries are relevant to several phenomenological settings, including electroweak baryon-number violating processes and nonperturbative contributions to axion physics. In such theories, the relevant configurations are not exact classical minima of the action, so evaluating their effects requires some care. Earlier work...
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Alex Biondi (Jagiellonian University in Krakow)6/23/26, 4:30 PMContributed Talk
Search for the Majorana Nature of Neutrino with the LEGEND Experiment
A. Biondi on behalf of the LEGEND Collaboration
Observation of the neutrinoless double beta (0$\nu\beta\beta$) decay would establish that neutrinos are Majorana particles and demonstrate violation of lepton number, providing a key ingredient for understanding the origin of neutrino masses and the matter-antimatter...
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Nils A. Nilsson6/23/26, 4:40 PM
Bumblebee gravity is currently a popular topic, and models are ubiquitus in the literature. In this talk, I will first review the current state of the art; then, I will show that the model propagates ghosts on cosmological as well as arbitrary backgrounds, resulting in a no-go theorem in the context of this model.
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Alessia Musumeci (Technical University of Munich)6/23/26, 4:40 PMContributed Talk
In different classes of models, semi-annihilation of Dark Matter (DM) can set the DM relic abundance. One of the most interesting features of this scenario is the generation of a boosted DM component (BDM), as part of the energy of the initial state is converted into kinetic energy of the DM particle in the final state. In this work, we consider the process $\chi \chi \to \chi^c\,\nu$, which...
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Guillermo Fernando Quispe Peña (Simon Fraser University)6/23/26, 4:40 PMContributed Talk
Features in the primordial power spectrum require numerical methods that are both accurate and scalable across the wide class of multifield inflationary models that produce them. Sharp turns in the background trajectories, induced by either potential or geometric effects, render these computations particularly challenging. In this work, we introduce an efficient method for evolving primordial...
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Dario Piani (Max-Planck-Institut für Kernphysik)6/23/26, 4:45 PMContributed Talk
The detection of coherent elastic neutrino-nucleus scattering (CEνNS) opens up new opportunities for neutrino physics within and beyond the standard model (BSM) of elementary particles. The first detection of CEνNS at nuclear reactors by the CONUS+ experiment allows very valuable tests of BSM scenarios in a low momentum transfer regime. Among them, Non Standard Interactions (NSIs), light...
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Satumaaria Sukuvaara6/23/26, 5:00 PMContributed Talk
While cooling down, the early universe is believed to have undergone symmetry breaking phase transitions. One attractive possibility for extending the Standard Model is that these phase transitions are of the first order, as they might be able to produce observable gravitational waves. We consider a dark matter freeze-out mechanism, filtering, where dark matter particles become massive in a...
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Parth Bhargava (ICG, Portsmouth)6/23/26, 5:00 PMContributed Talk
The classical evolution of fields during a period of accelerated expansion in the very early universe ("inflation") can establish an idealised homogeneous and isotropic cosmology. However, quantum fluctuations inevitably generate inhomogeneities and anisotropies on all observable scales and beyond. The $\delta N$ formalism provides a powerful framework to describe the nonlinear curvature...
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Matteo Pegorin (University of Padova & INFN Padova)6/23/26, 5:00 PMPoster
Next generation gravitational wave observatories, such as the Einstein Telescope and LISA, will require an improvement of up to two orders of magnitude in waveform model accuracy to control theoretical systematics in precision parameter estimation. In particular, robust inference of cosmological parameters and future null tests of general relativity require highly accurate predictions within...
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Matteo Cappelli (Sapienza Università di Roma e INFN, Roma I (IT))6/23/26, 5:00 PMContributed Talk
Coherent elastic neutrino-nucleus scattering (CE$\nu$NS) offers a broad range of physical and technological applications. First predicted in 1974 and remained undetected until 2017, the process is currently entering the era of precision measurements. For this purpose, low energy neutrinos from nuclear reactors represent an ideal source, enabling the investigation of CE$\nu$NS in the fully...
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Théodore Fischer (LUPM)6/23/26, 5:20 PMContributed Talk
The magnetic monopole of a dark sector has been advocated as an appealing dark matter candidate, since its stability naturally follows from topological arguments. I will revisit the computation of the monopole abundance generated by a thermal phase transition, exploring the three regimes where the phase transition is second order, weakly first order, or supercooled. This will allow us to...
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Adam Riess6/24/26, 9:00 AM
One of the most basic questions in cosmology is: How fast is the Universe expanding today? Two powerful approaches give answers that should agree but do not. Measurements based on the cosmological model calibrated by the cosmic microwave background predict one value for the Hubble constant H0, while direct measurements using the cosmic distance ladder give a higher value. The difference, now...
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Dr Vivian Poulin (LUPM, CNRS & U. de Montpellier, France)6/24/26, 9:35 AM
In this talk, I will present an updated “H0 Olympics” analysis using the latest cosmological datasets from Planck NPIPE, ACT DR6, SPT-3G, and DESI. We systematically compare twelve representative models from the recent literature, covering both early- and late-time proposals to resolve the Hubble tension. We also examine whether extensions such as a time-varying dark energy equation of state...
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Tamara Davis6/24/26, 10:10 AM
Based on 6 years of observations and ~1,500 new high-redshift supernovae, the Dark Energy Survey (DES) team presented tentative evidence in 2024 that dark energy may be changing with time. A few months later the Dark Energy Spectroscopic Instrument (DESI) team also presented hints of time-varying dark energy, by mapping the distribution of galaxies. This talk will review the current state of...
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Francesca Di Lodovico (University of London (GB))6/24/26, 11:15 AM
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Stefan Soldner-Rembold6/24/26, 11:50 AM
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Salvador ROSAURO-ALCARAZ (LPCA - CNRS)6/25/26, 9:10 AMContributed Talk
We study the possibility that dark matter primarily interacts with the SM through neutrinos, and the prospects for detection in neutrino detectors. In particular, we analyze the DSNB searches at Super-Kamiokande in terms of such a neutrino-dark matter interaction.
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Sam Dolan6/25/26, 9:30 AMContributed Talk
The quasinormal mode (QNM) spectra of black holes have been studied since the 1970s. In 2015 the imprint of the fundamental quadrupolar QNM was observed in the gravitational-wave signal from a binary merger. QNM (and Regge-pole) resonances have a local dependence on the potential maximum associated with the black hole light-ring, and also a global dependence on boundary conditions. In this...
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Emre Ozulker6/25/26, 9:30 AMContributed Talk
The H0 Distance Network (H0DN) combines multiple distance indicators (Cepheids, TRGB, SNe Ia, SBF, megamasers, and others) into a single covariance-aware linear system to determine the Hubble constant. The baseline analysis yields H0 = 73.50 +/- 0.81 km/s/Mpc (1.09% precision, 7.1-sigma tension with early universe based inferences that assume LCDM) and demonstrates robust stability across more...
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Prof. Bivudutta Mishra (BITS-Pilani, Hyderabad Campus)6/25/26, 9:30 AMContributed Talk
The Gauss-Bonnet invariant connects foundational aspects of geometry with physical phenomena in a variety of ways. Teleparallel gravity offers a novel direction in which to use the Gauss-Bonnet invariant to go beyond standard cosmology. In this work, we explore the cosmological perturbations of teleparallel gravity generalized through the Gauss-Bonnet invariant. This is crucial in...
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Julien Froustey (IFIC (CSIC-UV))6/25/26, 9:30 AMContributed Talk
Neutrinos play a pivotal role in the early Universe, as their evolution and decoupling set the conditions for Big Bang Nucleosynthesis (BBN) and influence subsequent cosmological epochs. In this talk, I will focus on the effects of neutrino flavour conversion before and during the decoupling epoch, and their implications across different contexts.
While flavour oscillations have only minor...
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Walter Marcello Bonivento (INFN Cagliari)6/25/26, 9:30 AMContributed Talk
The SHiP/NA67 experiment is a general-purpose intensity-frontier experiment for the search for feebly interacting GeV-scale particles and to perform neutrino physics measurements at the HI-ECN3 (high-intensity) beam facility at the CERN SPS, operated in beam-dump mode, taking full advantage of the available $4\times 10^{19}$ protons per year at 400 GeV. The collaboration is currently...
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Gisela Cristina Camacho Ciurana (ICE-CSIC)6/25/26, 9:50 AMContributed Talk
Increasingly precise observations are beginning to expose potential cracks in the standard cosmological model, from the Hubble constant tension to emerging hints of evolving dark energy. Resolving whether these point to new physics, and uncovering the nature of dark matter and dark energy, requires precise measurements of cosmic geometry and the growth of structure. The Dark Energy Survey...
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Michael Zantedeschi6/25/26, 9:50 AMContributed Talk
The memory burden effect describes how an object's stored information resists its own decay. This mechanism is especially pronounced in saturons—systems that saturate unitarity bounds on entropy—with black holes providing the prime example. I will show how memory burden can halt Hawking evaporation and dynamically stabilize black holes against complete decay. Crucially, this phenomenon is not...
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Sotirios Karamitsos (University of Tartu)6/25/26, 9:50 AMContributed Talk
Scalar-tensor theories of gravity are known to generically admit an effective imperfect fluid description, which leads to a natural interpretation of GR as a state of thermal equilibrium. In particular, it is possible to assign a temperature to nonminimally coupled fields, which increases as the theory deviates from GR. However, this temperature is conformally dependent, and can be arbitrarily...
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Dr Guillermo Franco Abellán (IFIC, CSIC - University of Valencia)6/25/26, 9:50 AMContributed Talk
A new tension is starting to emerge between the tight cosmological upper bounds on the total neutrino mass and the lower limits from oscillation data, with potentially far-reaching implications for cosmology and particle physics. Invisible neutrino decays provide a compelling particle physics scenario to understand such measurements. In this talk, I will present updated limits on a framework...
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114. Searches for new physics using unconventional signatures and techniques with the ATLAS detectorSergei CHEKANOV6/25/26, 9:50 AMContributed Talk
Many theories beyond the Standard Model (SM) have been proposed to address several of the SM shortcomings. Some of these beyond-the-SM extensions predict new particles or interactions directly accessible at the LHC, but which would leave unconventional signatures in the ATLAS detector. Alternatively, these signatures could be relatively standard, but could benefit from unusual techniques....
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Laura Herold6/25/26, 10:10 AM
The DESI galaxy survey has recently placed the tightest constraint on the sum of neutrino masses to date. For such effects “below the detection limit”, where data can only infer upper bounds, Bayesian and frequentist methods can give important complementary information. I will begin with a short overview of the frequentist profile-likelihood method, its advantages and limitations. Using a...
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Sergi Sirera (Institute of Cosmology and Gravitation)6/25/26, 10:10 AMContributed Talk
Determining the active screening mechanism from a general scalar-tensor Lagrangian remains a significant challenge when testing modified gravity models against cosmological observations. In this talk, I will present a new diagnostic framework based on a systematic study of nonlinear cosmological perturbations in luminal Horndeski theories. I will outline the derivation of a master equation for...
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Mario Fernandez Navarro (University of Zurich)6/25/26, 10:10 AMContributed Talk
In this talk, I will discuss the impact of lepton flavour asymmetries on BBN and the CMB. I will show that solving the momentum averaged quantum kinetic equations describing neutrino oscillations and interactions is an accurate approximation to the full momentum-dependent system. Our formalism allow us to study the scenario of total vanishing lepton number, revealing a rich flavour structure...
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Robie Hennigar6/25/26, 10:10 AM
I will describe a new class of semiclassical geometries capturing the quantum backreaction of thermal conformal fields in three-dimensional anti-de Sitter space. These “quantum solitons” arise from placing a brane in the four-dimensional AdS C-metric. From the brane perspective, the construction gives solutions of three-dimensional gravity coupled to a strongly coupled holographic CFT. The...
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Selaiman RIDOUANI6/25/26, 10:10 AMContributed Talk
Many theories beyond the Standard Model (SM) have been proposed to address several of the SM shortcomings, often predicting new particles which can be searched for at the LHC. This can include extended Higgs sectors, supersymmetric particles, heavy vectors or scalars, vector-like fermions, and further exotic particles. This talk will cover several related searches, focusing on prompt...
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Sinah Legner (University of Cambridge)6/25/26, 10:30 AMContributed Talk
Persistent cosmological tensions, including the Hubble and [curvature tensions][1], together with the theoretical challenge of unifying General Relativity (GR) with the other fundamental forces in particle theory, motivate the exploration of extensions to the $\Lambda$CDM model.
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We investigate the [Torsion Condensation (TorC) model][2], a framework derived from [Poincare Gauge Theory][3] that... -
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Paul Shah (UCL)6/25/26, 10:30 AMContributed Talk
The tantalising hint of evidence for dark energy evolution depends on the interplay of data from the cosmic microwave background, baryon acoustic oscillations and Type Ia supernovae. Two recent supernovae data releases, DES-Dovekie and Union3.1, have reduced the preference for evolution compared to previous versions. What has changed? And can the data be trusted?
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Llibert Aresté Saló6/25/26, 10:30 AMContributed Talk
I will discuss how Numerical Relativity can serve as a tool to study non-linear dynamics in effective field theories (EFTs) of gravity. I will first present our work on scalar-Gauss-Bonnet gravity, in which a change of gauge enables well-posed evolutions in black hole spacetimes, which reveal potential smoking gun signatures in gravitational-wave emission. I will then introduce a recently...
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Rasmi Hajjar (CCAPP - Ohio State University)6/25/26, 10:30 AMContributed Talk
In this talk, I will address the emerging anomaly between cosmological and oscillation constraints on the sum of neutrino masses. I will review the main implications of neutrino masses at both the background and perturbations levels, discussing the primary neutrino effects to which CMB data is sensitive, and finding valuable hints to evade cosmological bounds. Our findings show that the CMB...
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Tanisha Jhaveri (University of Chicago)6/25/26, 11:10 AMContributed Talk
Recent cosmological data reveal tension between parameters inferred from measurements of the cosmic microwave background (CMB), baryon acoustic oscillations (BAO), and supernovae (SN) under $\Lambda$CDM. Typical dynamical dark energy parameterizations (such as $w_0w_a$) that seek to jointly resolve these tensions have an equation of state parameter that crosses into the phantom regime, leading...
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Xubin Hu (University of Southampton)6/25/26, 11:10 AMContributed Talk
We discuss neutrino mass generation and Leptogenesis in GUT-motivated type-I seesaw models, focusing on the connection between matter-antimatter asymmetry and measurable low-energy neutrino parameters. Building on our study of flavour coupling, we show that spectator-induced effects can significantly reshape the viable regions in the space of the lightest neutrino mass, the Dirac CP phase, the...
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Alessandro Vadala (INAF - Astronomical Observatory of Rome)6/25/26, 11:10 AMContributed Talk
The characterization of the statistical properties of the cosmological density field represents a central topic in today's cosmology. Understanding the distribution of matter in the Universe provides a powerful means of testing the standard cosmological model and identifying possible deviations. Among the available probes to characterize the statistical properties of the cosmological density...
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Farbod-Sayyed Rassouli (University of Nottingham)6/25/26, 11:10 AMContributed Talk
Different notions of time arise from different choices of observer. In cosmological settings, a particularly natural choice is the spacetime volume, which is conjugate to the cosmological constant. This gives rise to unimodular time, deparametrizing the Wheeler–DeWitt equation into a Schrödinger-like evolution equation. I will first explain how this construction appears in arbitrary dimension,...
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Dr Trupti Patil (Korea Institute for Advanced Study, Seoul, South Korea)6/25/26, 11:30 AMPoster
To address emerging discrepancies among key cosmological parameters, I investigate interacting dark sector models as a possible resolution to the persistent $H_0$ and $S_8$ tensions. I focus on scenarios in which dark matter interacts with quintessence or phantom dark energy.
I will present the background and perturbation equations for the coupled dark matter–dark energy model and discuss...
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William Chan (University of Pennsylvania)6/25/26, 11:30 AMContributed Talk
A step towards probing the black hole interior and its structure is being able to detect the black hole microstate. We demonstrate that the Euclidean two-point function of an appropriately chosen probe operator can detect the microstate of an asymptotically AdS black hole. This detection, which requires a tuned, state-dependent choice of probe, is the result of a new gravitational saddle,...
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Nastassia Grimm (University of Portsmouth)6/25/26, 11:30 AMContributed Talk
Cosmological observations are well described by the LCDM model, a universe with a cold dark matter component and a cosmological constant acting as dark energy. However, more and more cosmological tensions have emerged in the past decades, putting this simple model into question. A large amount of research has focused on the quest for an alternative model of modified gravity and dark energy,...
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Pietro Ghedini (IFIC, CSIC - UV)6/25/26, 11:30 AMContributed Talk
The electron neutrino degeneracy parameter, $\xi_{\nu_\mathrm{e}} = \mu_{\nu_\mathrm{e}} / T$, is tightly constrained by Big Bang Nucleosynthesis (BBN), while the degeneracy parameters of the other neutrino species, $\xi_{\nu_\mathrm{x}}$, remain weakly constrained by cosmological observations alone. In this talk, we present constraints on $\xi_{\nu_\mathrm{e}}$ and $\xi_{\nu_\mathrm{x}}$...
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Bernardo Ricci6/25/26, 11:30 AMContributed Talk
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS Collaboration has developed a broad search program for DM candidates in final states with large missing transverse momentum produced in association...
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Adam Smith (University of Sheffield)6/25/26, 11:50 AMContributed Talk
Axion-dilaton models constitute a well-motivated and minimal class of theories that emerge in extra-dimensional completions of high-energy physics. These models naturally feature kinetic couplings between multiple scalar fields, which can have significant consequences in late-time cosmology. I will present the cosmological implications of these interactions when prescribing an axion and a...
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Nicola Barbieri (IFIC (CSIC-UV))6/25/26, 11:50 AMContributed Talk
We derive updated cosmological constraints on light axion-like particles (ALPs) coupled to leptons and photons using a full phase-space treatment of their production in the primordial plasma. The resulting non-thermal phase-space distributions are consistently propagated into calculations of cosmological observables, allowing a precise determination of their impact on $\Delta N_{\rm eff}$....
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Dr Mayank Tripathi (mtripathi@uchicago.edu)6/25/26, 11:50 AMContributed Talk
The PICO collaboration operates bubble chambers to search for WIMP dark matter, leveraging the excellent gamma rejection and long live fractions enabled by operating at a lower degree of superheat than the bubble chambers of the 1960s. This advancement allows for significantly improved background rejection while maintaining sensitivity to nuclear recoils. Located at the SNOLAB underground...
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Dr Serena Giardino (Imperial College London)6/25/26, 11:50 AMContributed Talk
Gravitational waves propagating through the universe inevitably encounter massive objects, getting deflected and magnified. The presence of lenses such as galaxies, clusters, or stars breaks the symmetries of the FLRW metric, allowing for new interactions between different polarizations. These bear the signatures of modified gravity and imprint distinctive effects on the waveforms. I will...
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Simone D'Onofrio (ICE - CSIC)6/25/26, 11:50 AMPoster
Tidal Love numbers (TLNs) encode the deformability of compact objects under external tidal fields and leave observable imprints in gravitational wave signals. While black hole TLNs vanish in vacuum general relativity, the presence of surrounding matter can alter this picture. This talk presents a study of the axial (magnetic) TLNs of a Schwarzschild black hole embedded in a spherically...
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Neel Shah (University of Portsmouth)6/25/26, 12:10 PMContributed Talk
The EFT of Dark Energy (EFTofDE) is a theoretically well-motivated class of modified gravity models, able to explain observational hints for dynamical dark energy with further testable predictions for structure growth and lensing. I will discuss the merits and challenges of combining probes of linear perturbations and present state-of-the-art constraints on the EFTofDE by combining CMB, BAO,...
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Angus Spalding (Univeristy of Southampton)6/25/26, 12:10 PMContributed Talk
I will show that spectral features of a gravitational-wave background can probe type-I seesaw parameters, independently of the gravitational-wave production mechanism. Long-lived Right-Handed Neutrinos generically induce a temporary period of early matter domination in the thermal history of the Universe, which imprints a feature in any primordial gravitational-wave background, characterised...
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Marina David6/25/26, 12:10 PM
We investigate quantum corrections to the tidal Love numbers of near-extremal Reissner-Nordström black holes. In the near-extremal regime, the black hole develops a long AdS2 throat whose low-energy dynamics are governed by the Schwarzian action and whose quantum fluctuations become parametrically large at low temperatures. We consider the tidal response to an external scalar field probing the...
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Sana Ouahada (University of Zurich)6/25/26, 12:10 PMContributed Talk
The XENONnT experiment operates a liquid xenon time projection chamber at the INFN Laboratori Nazionali del Gran Sasso, designed to search for weakly interacting massive particles (WIMPs). Its ultra-low background rate and low energy threshold, achieved to maximize WIMP sensitivity, also enable the study of other rare processes.
In this talk, I will present the latest results from XENONnT....
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Suvedha Suresh Naik (Korea Institute for Advanced Study (KIAS), Seoul, Republic of Korea)6/25/26, 12:10 PMPoster
Recent analyses of large-scale galaxy redshift surveys, such as those from Sloan Digital Sky Survey (SDSS) and Dark Energy Spectroscopic Instrument (DESI), as well as Type Ia supernova data, have made it possible to place meaningful constraints on the dark energy equation of state. Methods based on the Alcock–Paczynski test, which uses the clustering of large-scale structure as a standard...
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Prof. MARTIN BAUER (IPPP Durham)6/25/26, 2:00 PM
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Dr Joel Swallow (INFN - Laboratori Nazionali di Frascati)6/25/26, 2:35 PM
The NA62 experiment at the CERN north area was designed and built to study the $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay. The $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay is a golden mode for flavour physics, and became the rarest decay observed with a significance above 5 sigma following the NA62 measurement of...
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Fergus Wilson (Science and Technology Facilities Council STFC (GB))6/25/26, 3:10 PM
Semileptonic decays of $B$ mesons involving $\tau$ leptons are sensitive probes for physics beyond the Standard Model. The relative rates of the branching fractions $R(D) = \mathcal{B}(B \to D \tau \nu) / \mathcal{B}(B \to D \ell \nu)$ and $R(D^*) = \mathcal{B}(B \to D^* \tau \nu) / \mathcal{B}(B \to D^* \ell \nu)$, where $(\ell=e,\mu)$ are independent of the CKM element $|V_{cb}|$ and many...
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Diksha Jain6/25/26, 4:15 PM
In this talk, I will discuss the behaviour of the Euclidean path integral at low temperatures in the context of AdS_3 supergravity, highlighting the difference between near-extremal and near-bps limits. In our work, we analyzed quantum fluctuations in both the near-horizon and asymptotic regions and clarified various aspects of the bosonic fluctuations (namely, the rotational modes and gauge...
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Luigi Tizzano6/25/26, 4:50 PM
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Ahmed MARKHOOS6/26/26, 9:00 AMContributed Talk
With the Run 2 and Run 3 pp collision dataset collected by the ATLAS experiment at LHC, very precise measurements of Higgs boson production and decay rates can be performed, shedding light over the electroweak symmetry breaking mechanism. This talk presents the latest precise measurements of Higgs boson productions and decays, including fiducial, differential, as well as Simplified Template...
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Erik Jensko (University College London)6/26/26, 9:10 AMContributed Talk
Extensions of $\Lambda$CDM with interactions between dark matter and dark energy are a promising route to address the current cosmic tensions. In this talk, I will discuss interacting dark sector models with entropy couplings, which give rise to pure-momentum transfer in cosmology. While the background evolution is unchanged, the models are characterised by distinct observational signatures at...
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Xingchen Fan (Cornell University (US))6/26/26, 9:18 AMContributed Talk
We present a search for the rare Higgs boson decay H→Zγ using proton–proton collision data recorded by the CMS experiment at the LHC at center-of-mass energies of 13 and 13.6 TeV, corresponding to a total integrated luminosity of 200 fb⁻¹. The analysis targets final states where the Z boson decays to an electron or muon pair. Sensitivity is enhanced through dedicated event categorization...
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Olga Garcia Gallego (Institute of Astronomy, University of Cambridge)6/26/26, 9:30 AMContributed Talk
The Lyman-alpha forest is a powerful cosmological probe of matter density fluctuations in the weakly non-linear regime through the high redshift and underdense intergalactic medium (IGM). The most commonly used statistic to characterize these fluctuations is the 1D flux power spectrum. On small scales, the Lyman-alpha forest traces the properties of dark matter, encoding information on its...
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Linxuan Zhu6/26/26, 9:30 AM
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Elsa Teixeira (Laboratoire Univers et Particules de Montpellier, University of Montpellier)6/26/26, 9:30 AMContributed Talk
Interactions in the dark sector can arise through a variety of physical
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mechanisms, including energy exchange, momentum (elastic) transfer, and entropy
couplings. While these are often studied in isolation, their phenomenology can
overlap at the level of cosmological observables, leading to degeneracies in current
analyses. With the advent of Stage IV surveys, improving our ability to... -
Álvaro Lozano Onrubia (IFT UAM-CSIC & Universidad Autónoma de Madrid)6/26/26, 9:36 AMContributed Talk
Many well-motivated extensions of the Standard Model predict new, entirely bosonic sources of CP violation (CPV). In these scenarios, the simultaneous observation of carefully selected bosonic processes emerges as a simple yet powerful method to unambiguously reveal the presence of CPV. The present study, which establishes a promising framework of CPV searches for the upcoming HL-LHC era,...
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Daniel A. Kessler (University of Sheffield)6/26/26, 9:50 AMContributed Talk
Baryon acoustic oscillation (BAO) measurements from the Dark Energy Spectroscopic Instrument (DESI) strengthen the cosmological evidence for dark energy beyond the cosmological constant to the ~3σ level when combined with cosmic microwave background (CMB) and Type Ia supernovae (SNe Ia) observations. This evidence is obtained assuming a dark energy equation of state restricted to linear order...
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Stefan Lederer (NCBJ)6/26/26, 9:50 AMContributed Talk
Light dark matter is usually constraint by large-scale structure observations via Lyman-$\alpha$ lines to $m_\text{DM}\gtrsim \mathcal{O}(5\text{keV})$. I will discuss how these bounds can be relaxed for dark sectors which are produced non-thermally from the SM bath but cool themselves via $2\leftrightarrow3$ "cannibal" reactions.
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Ivonne Zavala6/26/26, 9:50 AM
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KAng-Sin Choi (Ewha Womans University)6/26/26, 9:54 AM
We revisit the renormalization of the Higgs mass using on-shell scheme. It is mass-dependent scheme and threshold correction is automatic. It clarifies that the renormalized Higgs mass $m^2(q^2)$ runs quadratically in the external momentum $q^2 \log q^2$ and the ratio $m^2(q^2)/q^2$ is order one up over all scale. The light Higgs mass is naturally explained by order one relation at the...
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Katia MICHIELSEN (LPSC, Grenoble)6/26/26, 10:10 AMContributed Talk
The n2EDM experiment aims to measure the neutron Electric Dipole Moment (EDM) with an unprecedented precision of $10^{-27} \, e$ cm.
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The EDM is the interaction between the neutron spin and an external electric field. It is measured via precession frequency measurements on stored ultracold neutrons.
A better measurement of the nEDM probes CP-violation Beyond the Standard Model and allows... -
Yuejia Zhai (University of Sheffield)6/26/26, 10:10 AMContributed Talk
We focused on a phenomenological interacting dark energy model (IDE) with energy-momentum transfer from dark matter to dark energy through a coupling $Q = ξ\mathcal{H}ρ_{DE}$. Following our previous work on constraining the parameters of the same IDE model using CMB and DESI data, we now present the N-body simulation results based on a modified version of RAMSES code. Compared with the...
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Prof. Lilia Anguelova (INRNE, Bulgarian Academy of Sciences)6/26/26, 10:10 AM
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Dimitrios Karamitros (University of Padova & INFN Padova)6/26/26, 10:10 AMContributed Talk
We investigate a scenario in which the dark matter is produced via freeze-in with contributions from both the UV and IR. We also take into account an additional production mode from the decay of the inflaton. We analyze the parameter space at the level of the dark matter phase space distribution to assess potential impact of a non-thermal distribution, including bounds from Lyman-$\alpha$ measurements.
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Maximilian Detering (King's College London)6/26/26, 10:12 AMContributed Talk
This work proposes a direct link between the hierarchy problem and Weakly Interacting Massive Particles (WIMPs): we suggest that the small mass of the Higgs boson arises from being dynamically driven to the scale of the WIMP. Such a special electroweak vacuum is singled out by lying close to the critical boundary of a phase transition, as recently explored in a new class of cosmological...
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Xingchen Fan6/26/26, 10:30 AM
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William Giarè6/26/26, 10:30 AM
In this talk, I will discuss how recent DESI results may reshape our understanding of the dark energy sector. I will focus on the emerging preference for late-time dynamical dark energy and its possible connection with early-time components active before recombination, often invoked to address the Hubble tension. I will ask whether early- and late-time dark energy require distinct extensions...
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Hansel Gordillo Ruiz (UNAM, Mexico)6/26/26, 10:30 AMContributed Talk
Recent results from DESI indicate that the accelerated expansion of the Universe may not be fully explained by a simple cosmological constant and instead may point toward a dynamical form of dark energy. At the same time, modular symmetries are emerging as important ingredients in string theory, as modular invariance is naturally built into many string compactifications. In this work, we...
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Yannis Georis (Kavli IPMU)6/26/26, 10:30 AMContributed Talk
The relic abundance of Dark Matter (DM) produced via thermal freeze-in is sensitive to the thermal history during and after cosmic reheating. In minimal models, this opens up the possibility to make predictions for collider observables by combining the requirement to match the DM relic abundance with observations of the Cosmic Microwave Background (CMB). We assess the impact of thermal...
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Alex Jenkins (University of Cambridge)6/26/26, 10:30 AMContributed Talk
False vacuum decay plays a pivotal role in many models of particle physics and the early Universe, from inflation to the electroweak vacuum. However, we lack a satisfying theoretical understanding of this process, with existing approaches working only in imaginary (Euclidean) time, and relying on assumptions that have yet to be empirically tested.
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In this talk, I will describe ongoing efforts... -
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Prof. Konstantinos Dimopoulos (Lancaster University)6/26/26, 11:10 AMContributed Talk
It is shown that the co-genesis of baryon asymmetry and dark matter can be achieved through the rotation of a spectator axion-like particle, because of a flip in the vacuum manifold’s orientation at the end of inflation. This can occur if the axion has a periodic non-minimal coupling to gravity (while preserving the discrete shift symmetry) in non-oscillating inflation models, where the...
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Mohammad Akhond6/26/26, 11:10 AMContributed Talk
During the last decade, the notion of an 't Hooft anomaly has
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been generalised to the case of discrete symmetries. An interesting
instance, discussed by Tanizaki, is the mixed anomaly between the
discrete axial symmetry and the flavour and baryonic symmetries in
massless QCD. The goal of this talk is to provide a derivation of this
anomaly from a top-down holographic dual of QCD. I will... -
Oleksii KURDYSH6/26/26, 11:10 AMContributed Talk
We present two analyses searching for new physics in the context of effective field theory approaches from the ATLAS collaboration. The analyses use multiple experimental measurements across a range of processes in electroweak boson, top-quark and Higgs production to constrain dimension-6 operators. In addition multi-boson production measurements provide leading constraints on anomalous...
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Anne Davis6/26/26, 11:10 AMContributed Talk
The sun is a powerful tool for investigating the dark universe. In the core of the sun light scalar particles can be produced via Primakoff process in the electric field of the ions and via the intense magnetic field. There can also be production vis the magnetic field in the tachocline. This allows for stringent constraints on new scalar particles which could play the role of dark energy....
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Raymundo Ramos (Korea Institute for Advanced Study)6/26/26, 11:30 AMContributed Talk
In this talk we discuss a recent search over the parameter space of the Next-to-Minimal Supersymmetric Standard Model using deep learning techniques. The particular focus of this search is identifying parameter values that explain hints of excesses around 95 GeV and 650 GeV in Higgs studies, and a discrepancy in Electro-Weakino searches, as well as predicting mono-H and mono-Z signatures of...
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Hanyu Cheng6/26/26, 11:30 AMContributed Talk
This talk will explore deviations from the standard cosmological model across cosmic history. First, I will present data analysis results on dynamical dark energy using a novel pressure parametrization and four parameters parametrization testing by the latest datasets. Second, I will discuss model-independent reconstructions of the reionization history using Gaussian processes. We utilize...
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David Cabo Almeida (University of Göttingen)6/26/26, 11:30 AMContributed Talk
In theories with extended scalar sectors, the lightest new scalar could be accessible at colliders. Instead of relying on simplified models, we describe such scenarios in a general and gauge-invariant way using an extended HEFT framework with a nonlinearly realized electroweak symmetry. The structure of the effective operators depends on the $SU(2)$ nature of the scalar in the UV, leading to...
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Mathilda Denison (University of Pennsylvania)6/26/26, 11:30 AMContributed Talk
Persistent small-scale challenges to the ΛCDM cosmological model have motivated the consideration of dark matter models with richer phenomenology. We consider a dark QCD scenario in which dark axions mediate a screened force between dark baryons within dark matter halos. Finite-density corrections to the dark QCD quark condensate introduce a density-dependent interaction term between dark...
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Shota Saito (Kavli IPMU)6/26/26, 11:30 AMContributed Talk
We classify 4D N=1 truly confining supersymmetric gauge theories, in which no center charges can be screened. This property guarantees that Wilson loops in the fundamental representation exhibit an area law. We systematically identify all such theories for simple Lie groups and determine the allowed matter content. In each theory, we find condensing magnetic operators, which are expected to...
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Lakshita Bageja (IISER,B)6/26/26, 11:50 AMContributed Talk
Holography(AdS/CFT correspondence) has proved to be quite useful in under-
standing field theory at the boundary from the information in the bulk and vice-
versa, the goal is to see if such a prescription can help us understand our universeand provide a mapping between cosmology and a CFT defined on a manifold with
boundary(BCFT). The bulk geometry is taken to be AdS with an...
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María Pérez Garrote (Universidad de Salamanca)6/26/26, 11:50 AMContributed Talk
I will present a cosmological model with a unified solid dark sector that transits from a CDM phase at high redshift to a quasi-de Sitter phase at late times. Remarkably, this can be accomplished without generating strong acoustic oscillations, thus being compatible with observations of the matter power spectrum. The solid unified dark sector can reduce the rate of matter clustering in the...
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Ludwig Schmidt (Technical University of Munich)6/26/26, 11:50 AMContributed Talk
Many proposed self-interacting dark matter (SIDM) models give rise to radiative processes that can dissipate energy from dark matter halos. We present the first extension of the N-body formalism for frequent small-angle self-interactions (fSIDM) that includes effective dissipation.
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We find that dissipation qualitatively changes the gravothermal evolution of SIDM halos beyond simply... -
Massimo Cipressi (SISSA)6/26/26, 11:50 AMContributed Talk
We explore the potential of future high-energy lepton colliders to probe heavy vector resonances.
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At wakefield colliders, intense beam-beam interactions produce radiation, called beamstrahlung,
which redistributes luminosity from the nominal energy across a broad spectrum of lower collision
energies. We show that this effect, conventionally viewed as a drawback, dramatically... -
Dong Ha Lee (University of Sheffield)6/26/26, 12:10 PMContributed Talk
The nature of dark energy has been a growing point of debate in recent years, particularly after the DESI measurements of the Baryon Acoustic Oscillations. While frequentist metrics appear to indicate a growing preference for a dynamical dark energy, some bayesian approaches indicate otherwise. Beyond this, there also lies the question of whether there exists a physical motivation behind any...
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AJAY Kaladharan6/26/26, 12:10 PMContributed Talk
Polarisation and spin correlations in diboson systems are powerful probes for precision tests of the Standard Model and searches for new physics. More recently, viewing these observables through the lens of quantum information, such as assessing whether diboson systems exhibit quantum entanglement, has opened a compelling new frontier in these investigations. They also provide a unique...
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Francesco Serra (Johns Hopkins University)6/26/26, 12:10 PMContributed Talk
I show that gauge theory and gravity admit local modifications in which all local symmetries are broken, leading to new gapless modes universally coupled to matter. The new modes have small speed, which suppresses all their interactions with matter, making them compatible with current observations. No new scales or fundamental fields are introduced in this approach, as the new physical modes...
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Susha Louise Parameswaran (University of Liverpool)6/26/26, 12:10 PM
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Benjamin Lehmann (Massachusetts Institute of Technology)6/26/26, 12:10 PMContributed Talk
The asteroid-mass regime is the key remaining window in which primordial black holes could constitute all of dark matter. I will present a new method to probe a substantial portion of this window using X-ray femtolensing. While photometric microlensing requires long observations of very stable compact sources, the energy-dependent features imprinted onto X-ray spectra furnish a clean target...
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Salvatore Bottaro6/26/26, 2:00 PM
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Alessandro Tomasiello6/26/26, 2:35 PM
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Albrecht Klemm6/26/26, 3:10 PM
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Dr Djuna Croon (IPPP Durham)6/26/26, 4:15 PM
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David Mulryne (Queen Mary University of London)6/26/26, 4:50 PM
Taylor expansion methods based on the separate universe approximation, or more general approaches that do not rely on this approximation, can provide insight into the debate on the strength of loop corrections in inflationary models with a large peak. Such a peak is needed for the production of primordial black holes and scalar-induced gravitational waves. In particular, these methods can...
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Fereidoun Sabetghadam (Mechanical engineering department, science and research branch ,IAU, Tehran, Iran)Poster
The short-distance singularities and infinite self-energies in classical and quantum field theories motivate the exploration of extended geometric structures. Recently [1,2], we introduced a homothetic extension of classical Weyl-integrable geometry by generalizing the conventional linear gauge transformations to affine homothetic transformations centered at a distinguished harmonic,...
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Shogo Matake (Kobe University)Poster
First-order phase transitions can occur in the early universe depending on the structure of the Higgs sector. A crucial quantity for determining the cosmological consequences is the transition rate.
Recently, the tunneling potential method has been proposed as a new framework for computing transition rates, based on a positive-definite action formulation with O(4)-symmetry. This makes the...
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Takuya Okawa (SISSA)Poster
Cold inflation provides an elegant explanation for the near homogeneity and flatness of the Universe. However, the simplest large-field models are disfavored by Planck CMB data, and fitting current observations typically requires inflationary potentials that appear fine-tuned from an effective field theory perspective. The curvaton mechanism alleviates this tension: a light spectator field...
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Pierros Ntelis (Harbin Institute of Technology and Institute of Theoretical Physics, National University of Uzbekistan)Poster
In this talk, I will introduce the polyLCDM model, a simple, extensive framework that classifies a set of modified gravity models, resulting to cosmological observables that can fit data, and tell us which classes are viable according to observations. Furthermore, I will discuss modified gravity and cosmology models based on Functors of Actions Theories (FAT) which predict actionions, actionic...
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Mr Wataru Chiba (Kobe University)Poster
We study photon-to-axion conversion in stochastic magnetic fields, focusing on the emergence of the nontrivial photon polarizations induced by conversion.
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Assuming Gaussian magnetic fields that may possess nonzero helicity, and unpolarized photons as the initial state, we derive expressions for the intensity and linear/circular polarizations of photons after propagation in terms of these... -
S SSPoster
This work investigates the generation of the observed matter--antimatter asymmetry of the Universe within the framework of $f(T,T_G)$ gravity, where $T$ is the torsion scalar and $T_G$ is its teleparallel Gauss--Bonnet counterpart. In this study, we consider two illustrative modified gravity models, $f(T,T_G)=f(T,T_{G})=\alpha T+\beta\sqrt{T_{G}}$ and $f(T,T_{G})=-T+\delta\;...
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William DeRocco (University of Maryland, College Park)Contributed Talk
Though dark matter has traditionally been sought in the form of a new, weakly-interacting particle, a viable alternative is that dark matter instead forms macroscopic clumps whose rarity has allowed them to elude detection up until this point. This may change in the coming years with new astronomical facilities allowing us to probe the Universe in ways previously unachievable. In this talk, I...
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Warin Patrick McBlain (SISSA)Poster
Using the analyticity properties of retarded Green's functions, we show that the Goldstone dispersion relations can be written in terms of ‘typically-real functions’: a well-known class of functions in Geometric Function Theory. This identification yields optimal two-sided bounds on Wilson coefficients of higher-derivative operators as explicit functions of the sound speed $c_s$. We test these...
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Enrico Specogna (University of Sheffield)Contributed Talk
In this talk we will look at a modification to the standard reionization history through the lens of a model for the optical depth ($\tau$) that is motivated by the recent results by JWST, which find sources of ionizing photons at redshifts larger than ever observed before. By using this JWST-driven model, which allows for a “bumpy” reionization history that pushes $\tau$ to higher values as...
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Ahmad Alachkar (CEA IPHT)Poster
Axion dark matter can modify electromagnetic phenomena through its coupling to photons, leading to new signatures in precision experiments. In the presence of an external magnetic field, the axion–photon interaction acts as an effective electromagnetic source that generates oscillating fields inside a cavity. Previous work by Brax and Brun showed that this mechanism can produce both classical...
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Safa Naseem (New York University Abu Dhabi (AE))Poster
Axions and axion-like particles (ALPs) provide well-motivated solutions to the strong CP problem and constitute compelling dark matter candidates. In this poster, I present complementary strategies for probing axions across a broad mass range using both laboratory-based direct detection and collider phenomenology.
On the direct detection side, I present results from a dielectric haloscope...
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Yu-Dai Tsai (University of California, Irvine)Poster
I will discuss the cosmic relic background of millicharged particles—hypothetical particles with electric charges much smaller than the electron’s—that may have been produced in the early universe and left an irreducible relic today. I will explain how experimental searches for these particles can provide novel probes of reheating cosmology, the poorly constrained epoch immediately after...
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Wei-Ning Deng (Astrophysics Group, Cavendish Laboratory, Cambridge)Poster
The CPT-Symmetric Universe model provides elegant solutions to major cosmological puzzles—including dark matter, the cosmological constant problem, and the universe's flatness puzzle—by positing that the Big Bang acts as a CPT mirror. However, the theoretical reason why the universe requires this mirror has remained an open question.
In this talk, we propose that the answer lies in the...
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Ananya Tapadar (Henryk niewodniczanski institute of nuclear physics of the polish academy of sciences)Poster
We explore a non-minimal secluded dark sector (DS) within an effective field theory (EFT) framework. We consider a suitable extension of the type-X Two Higgs Doublet Model (2HDM) as the ultraviolet origin of the secluded dark sector. The DS consists of a dark matter (DM) candidate and a mediator particle $a$. It is non-thermally populated through various dimension-6 four-fermion operators,...
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Adam Thomasson (The University of Manchester)Poster
Topological defects arising from cosmological phase transitions provide a direct link between early-Universe cosmology and particle physics. The two-Higgs-doublet model (2HDM) exhibits a rich vacuum structure, admitting a variety of topological defects including domain walls, strings and monopoles. A $\mathbb{Z}_2$ symmetry is often imposed to eliminate flavour-changing-neutral-currents...
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Dr Santanu Das (Institute of Engineering & Management, University of Engineering and Management)Poster
Recent cosmological observations confirm that the universe is undergoing a late-time accelerated expansion. To account for this phenomenon, an exotic component with negative pressure, known as dark energy, has been proposed. Among various dark energy models, the Holographic Dark Energy (HDE) model, motivated by the holographic principle of quantum gravity, has gained significant attention.
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Ms Vasiliki Karanasou (University of Tartu)Poster
In this presentation, we explore the rich cosmological dynamics of a symmetric teleparallel theory, the so-called Newer General Relativity (Newer GR) for a flat FLRW metric. We begin by introducing the fundamental concepts of non-metricity-based theories and Newer GR cosmology. We focus on two physically motivated one-parameter subclasses of theories for which the post-Newtonian parameters are...
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Muhammad Farhan (University of Bologna, Italy)Poster
Extensions of the Standard Model involving additional scalar degrees of freedom arise in a wide range of beyond-Standard-Model (BSM) scenarios, including dark matter models and mechanisms addressing electroweak naturalness. In this work, we investigate such scalar extensions within an effective field theory (EFT) framework, with emphasis on higher-dimensional operators and their...
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Mr Partha Kumar Paul (Indian Institute of Technology Hyderabad)Poster
We propose a minimal and testable framework for light fermion dark matter in the MeV–GeV mass range, charged under a dark $U(1)_D$ gauge symmetry that is spontaneously broken by a scalar field. The resulting dark-sector phase transition induces a mass gap that activates a forbidden annihilation channel into slightly heavier dark states, thereby setting the dark matter relic abundance while...
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Abhik Bhattacharjee (Harish-Chandra Research Institute (HRI))Poster
Precise measurements of the cosmological impact of dark sector relics can shed light on Physics beyond the Standard Model. In this work, we present Fisher forecasts on \textit{non-thermal LiMR} models for a CMB Stage IV-like experiment and the Simons Observatory---particularly focusing on a model of inflaton/moduli decay giving rise to non-thermally distributed dark sector particles, and also...
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Thomas REGGIO (Laboratoire de Physique de Clermont Auvergne)Poster
The freeze-in mechanism is an alternative to standard thermal freeze-out for cosmic dark matter production.
Freeze-in predictions can be sensitive to the initial temperature at the onset of the radiation domination era (reheating temperature) which, in most computations, is taken to be (effectively) infinite.
I will discuss dark matter freeze-in in a scenario where the reheating...
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Emilie Hertig (University of Cambridge)Poster
False vacuum decay (FVD) plays a central role in early-Universe cosmology, with implications for inflationary dynamics, baryogenesis, and Higgs stability. While this type of first-order phase transition is traditionally described using Euclidean instanton methods, the recent development of semiclassical lattice simulations has enabled us to model the decay process in real time.
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In this talk,... -
Victor Maura Breick (King's College London)Contributed Talk
Linear Standard Model Extensions (LSMEs) are a motivated set of simplified models for exploring the phenomenology of physics beyond the Standard Model (BSM) and assessing the reach of future colliders. They capture a wide range of BSM physics: any particle coupling linearly to the Standard Model (SM) with relevant or marginal interactions is an LSME. Examples include vector-like fermions, new...
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Roxane Theriault (Jagiellonian University)Poster
We study the gravitational waves induced by a scalar field undergoing ghost condensation---an analog of the Higgs mechanism in gravity---as it transitions to a canonical scalar field. The presence of this ghost condensate leads to an early matter-dominated era which transforms into a radiation-dominated era when the symmetry is restored. As a result, the production of induced gravitational...
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Peter William Millington (The University of Manchester)Poster
Dark matter and dark energy are problems of large, astrophysical and cosmological scales. Taking the perspective that these problems may therefore require us to introduce new physics in the infra red, we will argue in the case of additional spin-zero degrees of freedom that this invariably leads to scalar-tensor theories of gravity. Such low-mass physics must be able to evade existing tests of...
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Adam Gomułka (University of Warsaw, Faculty of Physics)Poster
We investigate lepton-flavour-conserving (LFC) and lepton-flavour-violating (LFV) axion-lepton couplings using cosmological data, addressing the specific mass ranges where the standard $\Delta N_\mathrm{eff}$ approximation fails. We implement a full phase-space treatment of thermal axion production and incorporate finite axion mass effects to test these couplings against Planck 2018 CMB and...
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Henry McKenna (University of Liverpool)Poster
We investigate a minimal extension of the Leptogenesis framework that simultaneously explains the observed baryon asymmetry and dark matter (DM) abundance through the decay of a heavy Majorana neutrino. In this scenario, CP violation arises from complex Yukawa couplings, enabling the generation of asymmetries in both the Standard Model (SM) and DM sectors. We explore two regimes: (i) wash-in,...
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Giuseppe Fanizza (LUM University)Poster
In this talk, I will present the full expression for the redshift-drift at second-order in perturbation theory, corroborate its validity by explicitly showing its gauge-invariance for both the observer and source terms, and discuss its validity also for cosmological models beyond LambdaCDM. Afterwards, I will discuss the geometrical hierarchy of the leading terms at leading and next-to-leading...
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Yuji Omura (Kindai University)Poster
We investigate the potential of leptonic meson decays M→ℓν, where M is a pseudo-scalar meson, as a probe of neutrino portal dark matter. The model of our focus features a neutral fermion ψ and scalar ϕ, which are coupled predominantly to neutrinos in Yukawa couplings. This interaction generates two corrections to the M→ℓν observables. The first one is a novel three-body decay process M→ℓψϕ....
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Qiang Li (Peking University (CN))Poster
We propose here a set of new proposals and some preliminary experimental results involving probing and knocking with muons (PKMu). There is a wealth of rich physics to explore with GeV muon beams either from dedicated beam or cosmic source. Examples include but not limited to: muon scattering can occur at large angles, providing evidence of potential muon-philic dark matter or dark mediator...
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Camilla Salerno (Istituto Nazionale di Fisica Nucleare)Poster
The DarkSide-20k is a next-generation dark matter experiment aiming at a direct detection of Weakly Interacting Massive Particles (WIMPs) via nuclear recoils in liquid argon. The detector, currently under construction at the Gran Sasso National Laboratory (LNGS), Italy, will benefit from the natural shielding against cosmic rays provided by the lab’s underground location. It will employ a...
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Qi-Xin Xie (University of Nottingham)Poster
Boson stars are appealing dark matter candidates and black hole mimickers. They have been extensively studied in classical gravity, but their quantum properties remain comparatively unexplored. We compute the quantum scalar fields and stress tensor in boson star spacetimes within the framework of semiclassical gravity. Divergences are regularized using Pauli-Villars fields, and accurate...
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Zois Gyftopoulos (Heidelberg University)Poster
In this talk, I will explore the phenomenological consequences of Quantum Scale symmetry in the matter sector of the Standard Model with Asymptotically Safe Quantum Gravity. In particular, trans-Planckian quantum scale symmetry in the matter sector induced by Asymptotically Safe Quantum Gravity, leaves an imprint on some of the Standard Model parameters, namely the CKM mixing elements. We...
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Lucy Elisabeth Komisel (Max-Planck Institute for Physics/LMU Munich)Poster
We implement a scenario of early relaxation of the axion via a high scale confinement within $SU(5)$ grand unified theory and study an epoch of strong QCD in inflationary cosmology. We consider scenarios in which, during inflation, the $SU(5)$ is either entirely or partially in the confining phase.This generates an early potential for the axion and dilutes its energy density removing any...
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Danila Shkinderov (University of Oxford)Poster
This project focuses on classifying supersymmetric solutions in 6D Euclidean U(1)^2 gauged supergravity. Five-dimensional SCFTs exhibit interesting features which we may probe by placing them on different curved backgrounds, however this can be difficult to study using field theory techniques. Holography, in particular the AdS/CFT correspondence, provides an alternative method. For example,...
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Frederic Lassiaille (FL research)Poster
The “Surrounding” model [1], based on a modification of Newton’s law, has demonstrated its ability to explain a variety of gravitational phenomena, including galactic rotation curves and anomalies traditionally attributed to dark matter. Recent improvements align the model with additional observational constraints, such as the Tully-Fisher relation and detailed small-galaxy velocity profiles,...
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María Agustina Pereyra Grau (Universidad de Buenos Aires - Instituto de Astronomía y Física del Espacio)Poster
We study how symmetries arising from extra dimensions can be used to derive constraints on string and supergravity effective actions. In Kaluza–Klein compactifications, some higher-dimensional symmetries are preserved, others are broken, and in special cases symmetry enhancements occur. While enhanced symmetries were shown to fix the higher-dimensional action before reduction [1,2], we show...
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Prof. John Ellis
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Rinat Kagirov (University of Oxford)Poster
Inflation requires highly homogeneous initial conditions on large scales. We investigate whether an initial Einstein static phase can naturally establish such conditions. In a hot, quasi-static Universe, thermal equilibrium can suppress inhomogeneities, providing a potential pre-inflationary homogenisation mechanism.
We construct a dynamical model in which a scalar field replaces the...
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Contributed Talk
The ICARUS T600 LAr-TPC detector (760 t of ultrapure liquid argon) was successfully operated for three-years at the underground LNGS laboratory, carrying out a sensitive search for LSND-like anomalous appearance in the CERN Neutrinos to Gran Sasso beam. The LSND anomaly has been the subject of numerous experimental investigations over the past 25 years, suggesting the possible existence of a...
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Francesca Passalacqua (INFN Padova)Poster
The large-scale distribution of galaxies encodes information about acoustic waves that propagated in the primordial baryon–photon plasma, leaving a characteristic feature in the two-point correlation function at scales of order 150 Mpc. By exploiting this feature, a new observable, known as the Linear Point, has been identified and shown to be a powerful cosmological standard ruler.
In...
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Nicklas Ramberg (SISSA)Poster
We present a new classical mechanism for nucleation of bubbles of true vacuum. The mechanism arises when dense boson stars form in the false vacuum. As the boson stars collapse due to attractive self-interactions, the field inside the star cores is enhanced beyond the potential barrier. Subsequently the stars explode as true vacuum bubbles, and induce a cosmological phase transition. The...
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