Using a (3+1)D hydrodynamic model, we analyze Λ hyperon polarization in heavy-ion collisions at √sNN = 200 GeV, revealing a strong dependence on initial conditions and QGP viscosity. The model accurately reproduces hadronic flow observables and predicts higher-order azimuthal oscillations in longitudinal polarization. Novel correlations between polarization and anisotropic flow are proposed,...
This analysis involves measuring the fiducial differential cross sections of high-mass di-lepton production with two hadronically decaying taus, using the full ATLAS Run-2 data.
One of the main motivations for this analysis is that it provides good sensitivity to a compelling BSM theory (LeptoQuark) that explains the anomalous b-hadron decay fractions observed at both BaBar and LHCb....
The LiquidO Consortium is bringing a novel approach to particle detection by using opaque scintillator to achieve self-segmentation down to the millimetre scale. Opacity via short scattering length stochastically confines scintillation photons close to the point of production and arrays of wavelength-shifting fibres trap and transmit the light to, typically, silicon photomultipliers.
At...
There is current interest in searching for beyond the standard model particles produced in association with a top quark pair, $t\bar{t} + X(X\rightarrow t \bar{t})$. This project focuses on a top-philic $Z’$ resonance model that may significantly enhance the $t\bar{t}t\bar{t}$ cross section. The all-hadronic channel is explored in the resolved regime using a novel machine learning algorithm,...
The status of the work towards a measurement of the CKM angle $\gamma$ with $B_d^0 → D^{∓} π^{±}$ decays in the LHCb run 2 data set is presented. The work presented includes signal isolation, time resolution studies, and neutral $B$ meson flavour tagging. Neutral $B$ meson flavour tagging is an integral component of analyses of this kind, which allows for the separation of $B_d^0$ and...
This talk will focus on the implications of the excesses observed around 95 GeV in the di-photon and di-tau invariant mass distributions by the CMS collaboration at the LHC, together with the long-standing discrepancy observed around the same mass region at the Large Electron-Positron (LEP) collider in the b-bbar final state. The latest ATLAS search in the di-photon final state reveals an...
With measurements in the b->sll transitions made by the LHCb showing deviations with the Standard Model, a similar measurement on the B->πμμ decay involving a suppressed b->dll transition has been proposed for a potentially more sensitive probe on the new physics. To maximise the experimental sensitivity, an unbinned maximum likelihood fit is applied to the dimuon mass spectrum using the full...
Non-linear scalar-tensor theories of modified gravity have been considered as candidates for dark matter and dark energy. Often, they possess screening mechanisms which allow them to evade detection from local experiments. Much is understood of their classical behaviour, but their quantum nature is relatively unexplored. We discuss a Green's function method for obtaining the leading order...
This study measures the Lund jet plane and the dead cone effect in b-jets from single-leptonic and di-leptonic $t\bar{t}$ events. Using the Cambridge/Aachen algorithm for jet reclustering, we look for suppressed emissions at small angles indicative of the dead cone effect. We employ a novel graph neural network based jet flavour tagger (GN2) that labels over 80% of b-hadron decay tracks via...
I will discuss the implementation of quarkonium parton shower and decay in Herwig 7, integrating non-relativistic QCD factorisation with spin-colour projections. Both colour-singlet and colour-octet channels are included, capturing S- and P-wave states and feed-down effects from higher excitations. The wavefunction formalism at small quark–antiquark separations is matched to short-distance...
Radiative decays of charmed hadrons are highly sensitive to flavor-changing processes, which are governed by the Standard Model (SM) but could also be influenced by new physics (NP). This sensitivity arises due to the Glashow-Iliopoulos-Maiani (GIM) suppression mechanism, which significantly restricts processes such as $|\Delta c| = |\Delta u| = 1$. The radiative charm decay $D^0 \rightarrow...
The ATLAS Collaboration has recently observed quantum entanglement in top-quark pairs using 13 TeV proton-proton collision data—marking the first observation of entanglement in fundamental quarks and at the highest energy scales ever probed and exposing limitations in state-of-the-art Monte Carlo simulations at the same time. Building on this milestone, this talk will explore new measurements...
The production of lepton pairs in two-photon UltraPeripheral Collision (UPC) draws significant interest for its characteristics of low extra hadronic activities. In particular, the $\gamma\gamma\rightarrow\tau\tau$ process provides a clean channel of tau lepton production. Such a property enables a precise measurement of tau anomalous magnetic moment $a_\tau$, providing a valuable probe of...
Charm quark fragmentation functions describe the probability of charm quarks hadronising into particular charm hadrons. Understanding such functions will provide valuable data for studies involving charm hadrons, such as the development of flavour tagging algorithms and MC event generators. This talk will discuss the approach to the measurement of the charm fragmentation function by analysing...
This talk will present a search for rare $b \rightarrow s \tau^{+} \tau^{-}$ transitions via the decay $\Lambda_{b}^{0} \rightarrow p K^{-} \tau^{+} \tau^{-}$, using $5.4 \ {\rm fb}^{-1}$ of data collected by the LHCb experiment. New Physics explanations for anomalies in combined fits to $R(D)$ and $R(D^{*})$ predict enhanced branching fractions of several orders of magnitude for $b...
Searches for rare decays of $B$ mesons into final states including four or six muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 5.6 fb$^{-1}$. These decays are experimental signatures of hierarchical sectors beyond the Standard Model proceeding via flavor-violating heavy vectors and a set of light...
Same- and opposite-sign charge asymmetries are measured in top-quark pair events in which a b-hadron decays semileptonically to a muon, using data corresponding to an integrated luminosity of 139 fb−1 from proton–proton collisions at a centre-of-mass energy of √s = 13TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. The charge asymmetries are based on the charge of...
High precision measurements of electroweak physics provide compelling tests of the Standard Model. To make such measurements a good understanding of both the detector alignment conditions and the initial state is required. The talk will discuss studies towards both at LHCb. First, a measurement of, and correction for, curvature biases will be presented, based on arxiv:2311.04670. This approach...
Many BSM models predict the existence of neutrally-charged long-lived particles (LLPs) with macroscopic lifetimes. When these LLPs decay back into SM particles within the ATLAS fiducial volume, they leave a striking signature in the form of displaced vertices (DVs). Due to its large size and precise tracking capabilities, the ATLAS muon spectrometer (MS) is a powerful tool for LLP...
LiquidO is a novel detector technology that uses the stochastic confinement of scintillator light in an opaque medium to increase particle identification efficiency. To collect this light a lattice of wavelength-shifting fibers runs through the medium, which are then read out using SiPMs. The unique particle identification down to the MeV scale and subsequent background rejection capabilities...
At the IceCube Neutrino Observatory, muon neutrinos are identified by characteristic long tracks due to high energy muons through the charged current (CC) interactions. On the other hand, ~17% of tauons resulting from tau neutrino CC interactions decay to muons and produce long tracks. However, energy sharing between hadronic showers and a muon is different between muon neutrino CC interaction...
The CKM angle $\gamma$ is a free parameter of the Standard Model of particle physics that determines the level of CP-violation in the quark sector. Measurements of this parameter test the unitarity property of the CKM matrix and act as a sensitive probe for physics beyond the SM. As such, it is a focus of several analyses at LHCb. Direct measurements are usually limited by factors such as...
The System for on-Axis Neutrino Detection (SAND), part of the Deep Underground Neutrino Experiment (DUNE), is designed to monitor the long-term stability of the neutrino beam at Fermilab. SAND reuses the lead scintillating-fiber electromagnetic calorimeter (ECAL) of the KLOE experiment with excellent time and energy resolutions. The calorimeter is read-out by approximately 5000 PMTs requiring...
Charged Higgs bosons Image appear in many Higgs-sector extensions to the Standard Model (SM). Searches for such a singly-charged Higgs scalar have been carried out at ATLAS and other collaborations, but until now the decay into a W boson and SM-like Higgs Image (ImageGeV) remained unexplored.
Here, we present a search for the decay Image with both Image and Image boosted, using the full ATLAS...
The ATLAS Collaboration has performed a range of searches for supersymmetry (SUSY) which have produced null results and extensive limits on sparticle masses in simplified scenarios. However, many SUSY scenarios could have evaded detection through a richer phenomenology not captured by simplified models. I will present the constraints from Run 2 ATLAS searches for the electroweak production of...
In this talk, I present an amplitude analysis of $B^+ \to D^- K^+ \pi^+$ decays using the full data samples collected by the LHCb experiment at the Large Hadron Collider in Run I and II. The structure in the Dalitz plot of the decay allows us to study excited neutral charm meson states in the $m(D^-\pi^+)$ system, measuring masses, widths and quantum numbers. The study of excited charm states...
Neutrinos produced in the highest energy extragalactic phenomena propagate through space, preserving energy and direction. Detection of these ultra-high-energy neutrinos can act as a telescope and as a method to probe physics at a new energy scale. At the EeV energy scale, neutrino-induced electromagnetic showers can be observed via the Askaryan effect. As the shower traverses a dense medium,...
Electroweak physics is foundational to particle physics' Standard Model via the spontaneous symmetry breaking and the emergent Higgs mechanism. Through this, the electroweak parameters can be interpreted as precision tests of the Standard Model with the possibility to suggest new physics.
The LHCb Upgrade I represents a major change for LHCb, including running at an instantaneous luminosity 5...
Trigger-Level Analyses are an alternative strategy to record data and trigger on low-mass or low-momentum final states with the ATLAS detector. The premise of the workflow is to save minimal information comprised of only the trigger-level objects needed to reconstruct final state processes, and the information needed to calibrate those objects. This reduces the size of events stored to disk,...
In this talk I will discuss the influence of axion dark-matter cores on the orbits of stars at the Galactic center. This dark matter candidate condenses into dense, solitonic cores, and, if a supermassive black hole is present at the center of such a core, its central part forms a `gravitational atom'. Here, I will present a calculation of the atom's contribution to the gravitational potential...
As part of the upgrades to the ATLAS detector to be performed during Long Shutdown 3 (LS3), which is scheduled from 2026-2030, the current ATLAS Inner Detector (ID), is to be replaced with an all-silicon Inner Tracker (ITk). The ITk is comprised of an inner silicon pixel and outer silicon strip detector and will provide higher radiation tolerance, granularity, and readout rate, to cope with...
We present an ongoing search for the decay mode $\Lambda_b^0 \rightarrow \Lambda_c^+ \overline{\Lambda}_c^- n$, utilising pp collision data collected at a center of mass energy of $\sqrt{s}$ = 13 TeV recorded by the LHCb detector. The sample was collected in 2016-2018 during Run 2 of the Large Hadron Collider. This analysis marks the first search at the LHC featuring a final-state neutron,...
A search is performed for long-lived particles decaying to pairs of muons by the CMS experiment recording proton-proton collisions at a centre-of-mass energy of 13.6 TeV at the LHC. The data is collected using a special stream which stores collision event information from 2022 and 2023 produced only by the High Level Trigger (HLT) system of CMS, thereby reducing the size of an event. This...
The abundance of matter over antimatter in the Universe is one the confounding puzzles of modern physics. The Sakharov's conditions require C and CP violation as an essential ingredient to explain the cosmic baryon asymmetry. So far, the only source of CP-violation observed is through the complex phases of the quark mixing (CKM) matrix in the flavour-changing weak interactions. However, the...
The talk will cover an exploration on the dilepton plus missing transverse energy (MET) signature from LHC run-III to search for two-component scalar Dark Matter (DM). The model discussed in this work is a 3-Higgs Doublet Model (3HDM) where two of the doublets are inert from the Standard Model (SM) and the other one is active and also the SM Higgs doublet, hence an I(2+1)HDM. Each inert sector...
A phenomenological Lagrangian for the interaction between a pseudo-scalar (axion-like) field and massive fermions is constructed and its statistical properties are discussed. For a gas comprised of neutrons which interact with axions we compute the equation of state, where causality and thermal equilibrium are explored. Numerical solution of the Tolman-Oppenheimer-Volkoff equations present the...
Next-generation neutrino detectors will require new simulation and reconstruction software. For water and scintillator-based neutrino detectors, RATPAC is a leading simulation framework. The latest release, RATPAC-two, brings several enhancements over the original version, improving both the usability and collaboration potential between experiments. With the 30-tonne BUTTON experiment at...
There is a long-standing discrepancy between theory and experiment in the evaluation of the muon g-2. The leading order hadronic contribution to the muon anomalous magnetic moment, aµHLO is the highest source of uncertainty in this evaluation. The MUonE experiment aims to measure aµHLO with high precision using a novel approach. The MUonE experiment will take place in CERN’s North area, using...
DarkSide-20k is a direct detection dark matter search experiment that will search for dark matter candidates with masses from the keV to Plank scale. The detection signature is scintillation produced by energy deposition in a 51-tonne dual-phase liquid Argon time projection chamber (TPC) and surrounding veto region. Argon scintillation is detected by 27 m2 of novel low-noise cryogenic silicon...
Initial matter density perturbations during the primordial era are set in motion by inflation, subsequently dictating the formation and evolution of the large-scale structure of the universe. In this research, we explored primordial non-Gaussianity in large scale structures of the universe at redshifts z = 1.0 and z = 1.5, focusing on the improvements the new and upcoming Euclid and SKA...
Rare event searches, such as those for dark matter and neutrinoless double beta decay, require increasingly sensitive detectors. A critical aspect of this is the reduction of backgrounds in the detector material.
High-grade copper is an attractive choice for detector materials, due to its commercial availability and lack of long-lived radioisotopes, the longest being 67Cu with a half-life...
nuSTORM (neutrinos from STORed Muons) is a future generation accelerator-based neutrino experiment that is currently in the planning stage. The aim of this project is to study neutrino-nucleus interactions and neutrino cross-sections with high precision, which is required for more precise oscillation measurements at long baseline experiments. Uniquely, it can make high-statistical measurements...
Scalar-tensor theories of gravity are a class of modified gravity theories that offer an alternative to Einstein’s general theory of relativity. The main aim of these theories is to address long-standing challenges of modern physics, such as the nature of dark matter and the origin of the accelerated expansion of the Universe. The latter of these problems can be addressed by the so-called...
The poster presents a review of the light injection (LI) system, a critical calibration tool for the upcoming Hyper-Kamiokande (Hyper-K) experiment, a next-generation Water Cherenkov detector designed to study neutrino properties with unprecedented precision. Neutrino oscillations, charge-parity (CP) violation, and proton decay searches are among the key physics goals of Hyper-K, making...
The proposed AN Underground Belayed In-Shaft (ANUBIS) experiment aims to search for long-lived particles (LLPs) within CERN's ATLAS underground cavern as a valuable addition to the LLP program at CERN. Recent efforts to realise the ANUBIS experiment include the installation and commissioning of a prototype detector, proANUBIS, which has been collecting LHC collision data since 2024. This data...
The Quantum Enhanced Superfluid Technologies for Dark Matter and Cosmology (QUEST-DMC) experiment aims to search for sub-GeV dark matter with a quantum-amplified superfluid 3He calorimeter. Cosmic rays and radiogenic backgrounds are expected to be dominant backgrounds in the region of interest, between eV to keV scale recoil energies, for a dark matter search. Characterising these backgrounds...
The FCC-ee is the proposed first phase of a next generation particle collider the Future Circular Collider with the first phase having electrons and positrons collided. The analysis shows the expected sensitivity, using statistical errors only, to the branching fraction of Higgs to invisible decay for the ZH process at the e+e− Future Circular Collider running at centre-of-mass energies of √s...
A summary of the analysis of the measurement of the electric dipole moment of the muon at the fermilab g-2 experiment, which was done using 25% of the total dataset. The sensitivity of the future measurement, using the full statistics, and an optimal weighting method, will be shown.
This poster presents a study on the tau ($\tau$) identification efficiency in $t\bar{t} \rightarrow \ell\tau_{\text{had}} \nu\bar{\nu} b\bar{b}$ events, using 29 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} = 13.6$ TeV, recorded by the ATLAS detector during LHC Run-3. A tag-and-probe method is applied to measure the efficiency of the RNN-based tau-ID algorithm, focusing on...
The Missing Transverse Energy (MET) is a variable that is used to quantify the energy (or transverse momentum) that is not reconstructed by the ATLAS detector. In recent years, an ML-approach to estimate the MET has been developed in ATLAS, called METNet, which uses a Neural Network to combine the Working Points used to reconstruct the MET into a new WP.
In this contribution, we present an...
The measurement of the muon anomalous magnetic moment (g−2) exhibits a significant discrepancy with the Standard Model. The dominant theoretical uncertainty arises from the leading-order hadronic contribution a_µ^HLO, evaluated using data-driven approaches based on e+e− to hadron cross-section data, or recent lattice QCD results. However, tensions within these methods complicate the comparison...
Darkside-20k is a dual-phase liquid argon time projection chamber designed to search for dark matter interactions. Interactions in the argon are observed using silicon-photomultiplier (SiPM) array detectors, composed of SiPMs assembled onto a printed circuit board to form a vTile. During production, the vTiles undergo quality assurance and quality control (QA/QC) testing at ambient and...
The QUEST-DMC experiment utilises surface-based superfluid helium-3 bolometers to search for sub-GeV dark matter with low energy thresholds. This talk outlines the impact of the dark matter stopping effect on QUEST-DMC’s projected sensitivity for both spin-dependent and spin-independent interactions. Our analysis employs two complementary strategies: (i) a straight-line path for dark matter...
The SNO+ Experiment is a versatile liquid scintillator neutrino detector situated at SNOLAB, with the primary goal of searching for neutrinoless double beta decay. In addition to ongoing measurements of reactor antineutrinos, solar neutrinos, geoneutrinos, supernova neutrinos, and other exotic phenomena, the SNO+ experiment is now preparing for an upcoming phase capable of neutrinoless double...
Belle II is a particle detector operating at the SuperKEKB accelerator located in KEK (High Energy Particle Research Organization) in Tsukuba, Japan. The facility collides electrons and positrons at centre of mass energy close to $\Upsilon (4S)$ resonance, which primarily decays into pairs of B mesons. The detector is designed to study light mesons and tau leptons. Entangled pairs of neutral...
At the Large Hadron Collider, the kinematic reconstruction of heavy, short-lived particles is crucial for precision measurements of the Standard Model and searches for new physics. Performing kinematic reconstruction in events with a high multiplicity of final-state objects is especially challenging due to the extensive potential combinatoric assignments. To address this, we present HyPER, a...
In the ATLAS experiment, electrons and photons are reconstructed from energy clusters detected in the electromagnetic calorimeter. To accurately determine their energy, corrections must be applied to the measured energy from these clusters. These adjustments account for energy losses occurring within the passive material of the calorimeter itself. Traditional Multi-variant Analysis methods...
Hyper Kamiokande (HK) is a next generation water Cherenkov detector, currently under construction in the Gifu Prefecture of Japan and due to begin operations in 2027.
The main physics goal of HK is to make the first observation of asymmetries in neutrino and antineutrino oscillations that arise from the CP violating phase. This is achieved by looking at oscillations within a neutrino beam...
The Short Baseline Near Detector (SBND) serves as the near detector for Fermilab's Short Baseline Neutrino (SBN) programme. It is a 112-ton Liquid Argon Time Projection Chamber (LArTPC) designed to study neutrino-argon interactions and search for new physics phenomena such as sterile neutrinos. Situated just 110 m from the Booster Neutrino Beam (BNB), SBND just began its first physics run and...
The search for Dark Matter particles has spanned 40 years. Definitive results remain elusive, and the heat is on. In this talk, I will explore both the physics and the people of dark matter research: the challenges we face (which are not just the backgrounds in our detectors), the realities of working in high-pressure environments—both above and below ground - and the critical role of public...
$b \to cl\nu$ angular analyses can provide valuable input of understanding New Physics in semileptonic B decays. An angular analysis of the $B^0 \to D^* \mu \nu $ decay is presented utilizing data collected by the LHCb experiment with 3$fb^-1$ integrated luminosity. Measurements of $R(D^*) - R(D)$ show a ~3.2$\sigma$ deviation from Standard Model (SM) predictions, motivating a detailed study...
MAGIS and AION are a pair of next-generation quantum sensors that aim to explore fundamental physics with atom interferometry. This new experimental regime is capable of probing a diverse range of physical phenomena by creating unprecedented macroscopic superpositions of matter waves, including detecting mid-band (0.1-10 Hz) gravitational waves, testing theories of wave-function collapse,...
Achieving unprecedented material radiopurity is paramount for ultralow background (ULB) physics experiments searching for rare events. In the BoulB laboratory, we have established a dedicated Inductively Coupled Plasma Mass Spectrometry (ICP-MS) facility to address this challenge. This presentation will first provide a concise overview of ICP-MS fundamentals. Subsequently, we will detail our...
With neutrino physics becoming more precise comes the opportunity to validate the unitary nature of the lepton mixing matrix which underpins it. While the assumption of unitarity for the 3×3 matrix is exploited in neutrino oscillation measurements, deviations of unitarity could hint at several neutrino mass generation models which are reliant on such. Efforts have been made to present global...
LUX-ZEPLIN (LZ) is a dark matter direct detection experiment operating over a kilometre underground at the Sanford Underground Research Facility in Lead, South Dakota, USA. At its core, the LZ detector consists of a dual-phase xenon time projection chamber, with an active volume containing 7 tonnes. This talk will cover the recent world-leading results from the primary LZ search for weakly...
The search for high-mass Higgs bosons within the Minimal Supersymmetric Standard Model (MSSM) framework represents one of the most compelling flagship analyses of the CMS experiment at the Large Hadron Collider (LHC). The $\tau^+\tau^-$ decay channel provides enhanced sensitivity at high masses due to large branching ratios, but significant challenges arise from Standard Model backgrounds,...
The proposed AN Underground Belayed In-Shaft (ANUBIS) experiment aims to search for long-lived particles within ATLAS underground cavern as a valuable addition to the dark matter programme at the CERN Large Hadron Collider. A prototype detector, proANUBIS, has been installed in ATLAS’ cavern and has been collecting data since 2024. This data will allow for studies of the expected backgrounds...
The Deep Underground Neutrino Experiment (DUNE) is an upcoming Fermilab experiment that is expected to start taking data in the late 2020s. Consequently, a significant portion of the current work revolves around modelling, prototyping, and other forms of preparation, much of it using Monte-Carlo simulation before a full-scale dataset has been produced. One of the key contributions to this is...
The Deep Underground Neutrino Experiment (DUNE) is a next generation long-baseline neutrino experiment. The experiment will study the changes in the neutrino flavour within the neutrino beam produced at Fermi National Accelerator Laboratory [FNAL, IL] and later measured at the Sanford Underground Research Facility [SURF, SD]. DUNE notably aims to study neutrino oscillations, determine their...
A large part of High Energy Physics is dedicated to correcting wrong distributions due to detector mismodelling, experimental measurement limitations and an insufficient theoretical understanding of non-perturbative processes. This often results in deviations between MC and data distributions, that require a lot of time to correct - especially in very high-dimensional, highly correlated...
The discovery of the Higgs boson at 125 GeV has provided profound insights into the origin of fundamental particle masses in the Standard Model and the mechanism of electroweak symmetry breaking. However, theories beyond the Standard Model suggest the potential existence of additional Higgs bosons in extended parameter spaces. Intriguingly, Run 2 data from both the CMS and ATLAS experiments ...
Recent advancements in laser technology have made it possible to probe the non-perturbative regime of quantum electrodynamics in strong electromagnetic fields. This regime, also known as strong-field quantum electrodynamics (SFQED), is still largely unexplored. The LUXE experiment planned at DESY will study the transition into the SFQED regime. SFQED interactions, such as non-linear Compton...
The LUX-ZEPLIN (LZ) experiment is a dual-phase time projection chamber with the primary aim of detecting WIMPs through direct detection methods. Light from scintillation within the detector is collected with arrays of PMTs and is recorded as waveforms in our data. LZ fundamentally relies on our understanding of all the information encoded in these waveforms . It is therefore paramount that we...
Two-Higgs-Doublet-Models are theoretical extensions of the standard model that can account for some of its unanswered questions, for example the source of the matter/antimatter asymmetry in the Universe. They predict 5 bosons, the scalar/pseudoscalar H/A and the charged H+ and H-, alongside the h (the standard model Higgs boson). This talk will present the (currently blind) search for the...
Owing to their single photon sensitivity and fast rise time micro-channel-plate photomultipliers (MCP-PMT) make a good candidate for photon detectors for the proposed Time Of Internally Reflected Cherenkov light detector (TORCH) detector. TORCH has a target time resolution per photon of approximately $70$\,ps, required to achieve a $3\sigma$ separation of pions and kaons at $10$ GeV/$c$...
The $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay is a golden mode for flavour physics. Its branching ratio is predicted with high precision by the Standard Model to be less than $10^{-10}$, and this decay mode is highly sensitive to indirect effects of new physics up to the highest mass scales. A new measurement of the $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay by the NA62 experiment at the...
Despite extensive efforts by many High Energy Physics experiments, no significant evidence for New Physics (NP) has been found. Novel analysis techniques, such as unsupervised Machine Learning (ML), have been proposed to try and extend the reach of these searches. This analysis uses unsupervised ML algorithms to perform event-based Anomaly Detection (AD) to search for BSM physics using Run 2...
Radiotherapy is a cornerstone of modern cancer treatment, utilising x-ray photons, electrons and ion beams to non-invasively target cancerous tumours, effectively. The Laser-hybrid Accelerator for Radiobiological Applications (LhARA) is a novel laser-driven accelerator system currently under development that aims to transform Particle Beam Therapy (PBT) by enabling flexible, high-flux...
T2K is a long-baseline neutrino oscillation experiment located in Japan, designed to investigate the properties of neutrinos by measuring their oscillations between different flavours. The experiment’s oscillation analysis requires precise predictions of event rates, where systematic uncertainties, particularly those related to neutrino flux, play a significant role. The experiment has a near...
The LUX-ZEPLIN (LZ) experiment features a liquid xenon time projection chamber designed to detect weakly interacting massive particles (WIMPs) with exceptional sensitivity. Among its background signals, scintillation-only events are particularly challenging to study due to their poor spatial reconstruction; yet, they play a significant role by contributing to accidental coincidence backgrounds...
The experimental search for a neutron Electric Dipole Moment (EDM) provides an extremely sensitive probe for CP violating physics beyond the Standard Model. The most precise measurement comes from a PSI based experiment giving an upper bound of $1.8\times10^{-26}$ $e$cm (90% CL) on the neutron EDM, by measuring spin precession of ultracold neutrons generated from a solid deuterium source and...
Muon colliders offer high-luminosity, multi-TeV collisions with minimal synchrotron radiation, but their feasibility depends on advancements in muon production, cooling, and storage. The proposed Muon Collider Demonstrator complex addresses two key aspects: with the neutrinos from Stored Muons (nuSTORM) experiment for muon storage, and the 6D cooling demonstrator for muon cooling.
The 6D...
A charmless $B \to VV$ decay consists of a B-meson to two spin-one vector decay with a four hadron final state. The decay amplitude for a given $B \to VV$ decay is described by a basis of three amplitudes, where a particiular interest in these decays stems from the expected hierarchy in these vector-vector amplitudes being violated for modes involving penguin decays (this is often referred to...
The High Luminosity LHC (HL-LHC) is set to begin in 2029 and will be Run 4 of the ATLAS detector. As part of the phase 2 upgrade, the ATLAS Inner tracking system will be replaced with an all-silicon Inner Tracker(ITk). The higher luminosity will cause an increase in pileup, the number of interactions per crossing, resulting in more tracks, increasing the computational complexity of track...
High-voltage CMOS (HV-CMOS) technology is one of the latest technologies used for tracking detectors. They provide cost-effective high radiation tolerance, fast charge collection and low power consumption. HV-CMOS is a full commercial process that is suitable for large-area applications. The integrated sensor and readout design also allow for much easier detector assembly, compared to the...
Simulated data studies (SDS) are a method to test alternative particle interaction models within the T2K neutrino oscillation experiment. This work is focused on interactions in the ND280, T2K's near detector. Monte Carlo (MC) simulations are fitted to ND280 data and are subsequently used to inform the predictions of neutrino event rates at the far detector, Super-Kamiokande. The MC methods...
LUX-ZEPLIN (LZ) is the world’s most sensitive direct dark matter detector. It is located deep underground at the 4850 ft level at the Sanford Underground Research Facility (SURF) in Lead, South Dakota. This is a quiet environment, shielded from cosmic rays. LZ utilises 7 tonnes of liquid xenon in a time projection chamber as a target for extremely rare dark matter particle interactions. LZ...
Silicon Photomultipliers (SiPMs) have been chosen as the dedicated optical readout technology for the upcoming DarkSide-20k experiment. This novel technology is being adopted as a replacement for photomultiplier tubes (PMTs) in the DarkSide-20k detector, due to the higher quantum efficiency, lower radiopurity and reduced noise levels at cryogenic temperatures of SiPMs relative to PMTs....
The DUNE Near Detector (ND) will have sufficiently high statistics to constrain the contributions from the neutrino flux, interaction cross-section, and detector efficiency. Neutrino-nucleus cross-sections will be a large source of systematic uncertainty for DUNE. It is therefore crucial to constraint this uncertainty as much as possible in order to make precision measurements of the neutrino...
Charged Lepton Flavour Violation (cLFV) is only permitted in the Standard Model of Particle Physics through the oscillation of a neutrino, and hence has branching fractions of the order $10^{-54}$, well below the reach of current experiments. Therefore, searches for cLFV have direct sensitivity to new physics models that would enhance the production of such modes, where any observation...
The LZ experiment, located at the Sanford Underground Research Facility in Lead, South Dakota, utilises a dual-phase xenon time projection chamber (TPC) with a 7-ton active volume to detect dark matter candidates. Recently, the LZ experiment announced world-leading sensitivity results in one of the strong candidates for dark matter, Weakly Interacting Massive Particles (WIMPs), based on a...
The search for mixing-related CP violation in the charm sector is a topic of significant interest, as this phenomenon is predicted to occur at an extremely suppressed level within the Standard Model. Consequently, any observable signal at the current experimental sensitivity could provide compelling evidence for New Physics. Such measurements can be achieved through phase-space binned analyses...
The MINERvA experiment is a high-statistics, scintillator-based neutrino-scattering experiment located within the intense NuMI beamline at Fermilab. Designed with multiple nuclear targets—including iron, lead, water, graphite, plastic scintillator, and helium, MINERvA is able to directly compare neutrino interactions across different nuclear environments in the same neutrino beam.
MINERvA...
BUTTON is a water medium scale WbLS and Cherenkov technology testbed. It is designed to prove the capabilities of advanced photosensors and fill media including water based liquid scintillator (WbLS) in a low background facility. BUTTON features a volume of 30 m^3 which has been designed with specially compatible materials for use with Gadolinium (Gd) doped water, WbLS and also Gd doped WbLS....
Dark matter makes up most of the mass content in the universe, yet its nature remains one of the biggest unanswered questions in physics. Many experiments are searching for WIMP-like dark matter directly and exploiting improvements in sensitivity thanks to the Migdal effect, a rare atomic process. However, this process is yet to be observed in nuclear scattering. The MIGDAL experiment aims to...
A measurement of the effective lifetime in $B^0 \to J/\psi K^{*0}$ decays will be performed utilizing data collected in 2024 with the newly upgraded LHCb Upgrade I detector. Effective lifetime measurements of $b$-mesons offer a precise probe for weak decays in the Standard Model. These lifetimes can be calculated within the Heavy Quark Expansion (HQE) framework, though precise theoretical...
DUNE is a next generation long-baseline experiment with the key goals to conduct a comprehensive program of neutrino oscillation measurements, search for proton decay in several modes, and to detect and measure the neutrino flux from core-collapse supernova within our galaxy. DUNE will have a far detector that will observe neutrinos after travelling 1300km, where they may have oscillated, and...
With the increasing volume and complexity of data, machine learning (ML) models are becoming indispensable tools for identifying patterns within structured datasets. However, as these models grow in complexity, it becomes challenging to determine whether they are truly learning meaningful relationships or capturing unintended artifacts. This lack of interpretability leads to mistrust,...
Several search approaches have been employed for Dark Matter (DM), with “direct detection” being one of the most prominent. It aims to observe DM from the Milky Way halo via its coherent elastic scattering off a nucleus.
Electroformed copper (EFCu) is a material of choice for large-scale detectors thanks to its favorable radiochemical, thermal, and electrical properties. To fulfil the...
Current neutrino experiments are making world-leading measurements of the PMNS parameters and are continuing to collect data and improve their analyses to push towards the precision era. In such efforts, new data targeting neutral current $\pi^{0}$ interactions are being added to the T2K oscillation analysis. This sample constrains the $\pi^{0}$ background in the electron neutrino appearance...
The High Luminosity upgrade to the LHC (HL-LHC) will increase the rate of proton-proton collisions by a factor of approximately seven, yielding greater statistics for physics analyses but also creating a challenging pileup environment. To exploit the increased luminosity and maintain physics sensitivity, the CMS detector will undergo many significant upgrades, including to its level-1 trigger...
We present a search for $CP$ violation in the Cabibbo-suppressed $D^0\to \pi^+ \pi^- \pi^0 $ mode with more than 1.6M signal candidates, allowing for the most precise amplitude modelling of this decay to date. The measurement uses data sample of $pp$ collisions collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4 $fb^{-1}$. The $D^0$ mesons are...
The future XLZD collaboration, which combines the LZ, XENONnT, and DARWIN experiments, aims to fully cover the WIMP parameter space down to the neutrino fog limit, becoming the ultimate dark matter effort in the search for WIMPs. XLZD will utilise a 60-80 ton liquid xenon time projection chamber, providing the immense exposure required for this challenging endeavour. Additionally, this future...
DUNE is a next generation long-baseline neutrino experiment which will make precision measurements of the neutrino oscillation parameters including $\delta_{CP}$, and determine the neutrino mass hierarchy. DUNE will use a megawatt neutrino beam and two detector complexes, Near and Far, located at Fermilab and SURF, respectively. In contrast to the current generation of long baseline neutrino...
The Deep Underground Neutrino Experiment (DUNE) will allow for the detection of low-energy neutrinos from core-collapse supernovae, providing critical insights into core-collapse supernova processes such as neutronization and accretion. However, reconstructing these interactions in liquid argon time projection chambers (LArTPCs) presents significant challenges due to the low-energy...
Flavour Changing Neutral Current (FCNC) decays of $B_s^0$ meson into a pair of charmless mesons has been the subject of much experimental and theoretical interest. The decay process is predominated by the loop-level $\bar{b}\to\bar{s}s\bar{s}$ progress, which is suppressed in the Standard Model. This analysis is aimed to measure the branching fraction of the rare decay mode...
The Mu3e experiment is dedicated to observing charged lepton flavour violation. This is observed through the neutrinoless decay of a muon to two positrons and an electron. The experiment is situated around the Compact Muon Beam Line (CMBL) at the Paul Scherrer Institut, which produces muons at a rate of 10E8 Hz. The experiment aims to observe the decay or exclude a branching ratio greater than...
The XLZD experiment will be the largest and most sensitive direct detection dark matter search to date, demanding significant infrastructure and resources. To minimise its environmental impact, preconstruction efforts are underway to quantify, reduce, and offset emissions across the project lifecycle. This includes emissions tracking, sustainable material selection, and for the first time in a...
