In this talk, I'll highlight the latest results from the CMS experiment at the LHC, including the recent precision measurement of the W boson mass, numerous searches for beyond the standard model phenomena, and the host of precision measurements in the electroweak and QCD sectors. I'll discuss the latest developments in artificial intelligence techniques in application to CMS physics analysis,...
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 $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay by the NA62 experiment at the CERN...
The nature of Dark Matter (DM) remains one of the greatest puzzles in particle physics and cosmology. While overwhelming observational evidence across galactic and cosmological scales confirms its existence, decades of experiments have only verified its gravitational interaction. Key properties of DM -- such as its spin, mass, non-gravitational interactions, stabilizing symmetry, number of...
In the RHIC spin program, the Atomic Polarized Hydrogen Gas Jet Target (HJET) was constructed to measure the absolute polarization of proton beams. Recoil protons from the vertically polarized proton beam CNI (Coulomb Nuclear Interference) scattering off the vertically polarized proton jet target were detected using left-right symmetric Si detectors. Since the jet polarization is well known,...
Many theories beyond the Standard Model (SM) have been proposed to address several of the SM shortcomings, such as explaining why the Higgs boson is so light, the origin of neutrino masses, or the observed pattern of masses and mixing angles in the quark and lepton sectors. Many of these beyond-the-SM extensions predict new particles or interactions directly accessible at the LHC. This talk...
NA64 is an active target experiment that utilizes high-intensity electron, positron, and muon beams generated by the collision of high-energy protons from the CERN Super Proton Synchrotron (SPS) with a target and subsequently guided to the NA64 detector. The experiment primarily employs the missing energy technique to search for dark matter particles in the sub-GeV mass range and other physics...
I will describe theories with low scale seesaw mechanisms implemented to generate the SM fermion mass hierarchy. In the first part of my talk, I will explain an extended 2HDM theory where the tree level Universal seesaw and Zee-Babu mechanisms generate the SM charged fermion mass hierarchy and tiny active neutrino masses, respectively. The theory is consistent with SM fermion masses and...
The XENONnT experiment is aiming for the direct detection of dark matter in the form of weakly interacting massive particles (WIMPs) by investigating potential interactions with ordinary matter using a liquid xenon (LXe) time projection chamber. The detector, operating at Laboratori Nazionali del Gran Sasso (LNGS) in Italy, contains a total xenon mass of 8.6 tonnes, of which 5.9 tonnes are...
In the high-luminosity era of the Large Hadron Collider, the instantaneous luminosity is expected to reach unprecedented values, resulting in up to 200 proton-proton interactions in a typical bunch crossing. To cope with the resulting increase in occupancy, bandwidth and radiation damage, the ATLAS Inner Detector will be replaced by an all-silicon system, the Inner Tracker (ITk). The innermost...
Recent advances in nuclear theory, QCD phenomenology and experiments at the future EIC could soon lead us to both penetrate and visualize the deep structure of visible matter, answering questions that could not even be afforded before. In particular, deeply virtual exclusive experiments are believed to be probes of the orbital angular momentum of the proton's constituents, as well as of its 3D...
Understanding nucleon structure in the valence region, where one quark carries a large fraction x of the nucleon momentum, is a fundamental goal in hadronic physics. Many models and theoretical predictions exist for the behavior of the ratio d(x)/u(x) of up over down quark densities, and for the intrinsic polarization of up and down quarks inside a polarized nucleon as x approaches...
The Deep Underground Neutrino Experiment (DUNE) is a next-generation long baseline experiment under construction in the United States. Using a high-intensity neutrino beam produced at Fermilab, DUNE will measure the oscillation of muon (anti)neutrinos into electron (anti)neutrinos with a kilo tonne scale detector located in South Dakota. A near detector will be constructed in Fermilab to...
Observations have established that the dark matter mass density is about five times that of ordinary matter, rather than being orders of magnitude different. This coincidence is potentially explained by asymmetric dark matter. In almost all such models, however, while the number density asymmetries of ordinary and dark matter are related, the mass of the dark matter particle is left as a free...
Study of hadron spectrum provides one of the best avenues for understanding properties of the strong interactions in the non-perturbative regime. The spectrum of hadronic states containing one or more constituent strange quarks has not been well established compared to the spectrum of hadrons with lightest u- and d-quarks. In order to advance our knowledge of the hyperon spectrum, a new...
ALICE is a dedicated experiment built to probe and explore the high-density, deconfined QCD matter produced in relativistic heavy-ion collisions at the Large Hadron Collider (LHC). The complexity of these collisions—featuring numerous competing physics processes that influence the final detected particles—requires a vast amount of data and diverse measurements to unravel the properties of...
We propose an extended Left-Right symmetric model with an additional global symmetry U(1)X, which after spontaneous symmetry breaking collapses to a residual subgroup Z2, ensuring that the light active neutrino masses are generated via a double seesaw mechanism at two loop level, with the Dirac submatrix arising at one loop. It also guarantees one loop level masses for the SM charged fermions...
The Liquid Argon Calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region |η| < 3.2, and for hadronic and forward calorimetry in the region from |η| = 1.5 to |η| = 4.9. They also provide inputs to the first level of the ATLAS trigger. In 2022 the LHC started its Run-3 period with an increase in luminosity and pile-up of up to 60 interactions per...
The High-Luminosity Large Hadron Collider (HL-LHC) will enable a more detailed exploration of new physics phenomena by significantly increasing collision rates, leading to pileup levels of approximately 200 simultaneous interactions. The CMS experiment will add a new detector, the MIP Timing Detector (MTD) to cope with these challenges. The MTD is designed to mitigate pileup effects by...
While the on-going Run-3 data-taking campaign will provide twice the integrated proton-proton luminosity currently available at the LHC, most of the data expected for the full LHC physics program will only be delivered during the HL-LHC phase. For this, the LHC will undergo an ambitious upgrade program to be able to deliver an instantaneous luminosity of $7.5\times 10^{34}$ cm$^{-2}$...
Sterile neutrinos are present in multiple extensions to the Standard Model and participate in neutrino mass mechanisms, from simple type-I seesaw models to UV complete theories like left-right symmetry. In total analogy to the case of light neutrinos, the neutrinoless double β decay amplitude induced by the exchange of sterile neutrinos requires the introduction of a leading-order, short-range...
CONNIE (COherent Neutrino-Nucleus Interaction Experiment) utilizes high-resistivity silicon CCDs to measure coherent elastic neutrino-nucleus scattering (CEvNS) of reactor antineutrinos on silicon nuclei at the Angra-2 reactor in Brazil. In 2021, the setup was enhanced with two Skipper CCDs, pushing the sensitivity threshold to 15 eV and demonstrating the potential of Skipper CCDs in reactor...
To address the demanding conditions of increased luminosity and higher pileup expected during the high-luminosity phase of the LHC (HL-LHC), the muon spectrometer of the CMS experiment will undergo significant upgrades. These enhancements aim to ensure robust operation under challenging data-taking conditions while improving the tracking and triggering performance of the system.
The...
The Minimal Dark Matter idea postulates that the dark matter can be the neutral component of an $SU(2)_L$ multiplet. This idea has been intensively studied for the case of fermion and scalar fields. For many years, our group have extended this paradigm to the case of massive vector fields. We have studied the phenomenology of vector dark matter for vector fields in the fundamental, adjoint and...
We study multifield extensions of Reggeon Field Theory (also equivalent to Directed Percolation model) at criticality in the improved one-loop perturbative expansion using Wilsonian regulator and ϵ-expansion below the upper critical dimension Dc = 4 at one loop. Analyzing all the fixed points of the renormalization group flow for two flavors, we were able to find different interactions between...
The string and brane tensions do not have to be put in by hand, they can be dynamically generated, as in the case when we formulate string and brane theories in the modified measure formalism. Then string and brane tensions appears, but as an additional dynamical degree of freedom . It can be seen however that these string or brane tensions are not universal, but rather each string and each...
The large top quark samples collected with the ATLAS experiment at the LHC have yielded measurements of the production cross section of unprecedented precision and in new kinematic regimes. They have also enabled new measurements of top quark properties that were previously inaccessible, enabled the observation of many rare top quark production processes predicted by the Standard Model and...
I will present a study on axion-like particles (ALPs) with quark-flavor-violating couplings at the LHC. The ALPs can originate from decays of top quarks which are pair produced, and then decay to jets. If these couplings to the quarks are tiny and the ALPs have masses of the order of 10 GeV, they are long-lived, leading to signatures of displaced vertex plus multiple jets. We recast a recent...
In this talk, I will present the development of the homotopy method for solving the nonlinear Balitsky-Kovchegov (BK) equation with a running QCD coupling. I will show how an analytic solution is obtained for a simplified equation with a leading-twist BFKL kernel, satisfying initial and boundary conditions. In the second stage, we calculate the corrections to this solution. These corrections...
Recent results will be presented on the Mellin moments of parton distributions as well as on generalised parton distribution functions of the proton. We will show results using twisted mass fermion ensembles simulated with physical values of the light quark mass.
In this study, we present the potential of discovering new physics associated with a new charged vector boson decaying into heavy neutral leptons, using ultraperipheral lead ion collisions. We identify the optimal kinematic cuts that increase the statistical significance, which would allow us to detect signals of the possible existence of these particles, as predicted by the Vector Scotogenic...
We show how to apply hyperasymptotic expansions to QCD observables. This allows, in principle, to achieve exponential ($\sim exp (-1/\alpha)$) accuracy in their determination with a well defined parametric error. A selected set of applications we will discuss are heavy quark mass expansions, the static potential and the gluon condensate.
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN will significantly increase the collider's particle density, presenting new challenges for the ATLAS experiment's detectors. To address these challenges, a new radiation-hard beam monitoring system has been developed to protect the inner silicon detectors and accurately monitor the increased luminosity. This system...
ALICE (A Large Ion Collider Experiment) at the LHC aims at investigating the hot and dense QCD matter formed in ultra-relativistic heavy-ion collisions, and the transition to the Quark-Gluon Plasma (QGP). The suppression of charmonium and bottomonium states by color screening, and its hierarchy resulting from differences in binding energy, is a signature of QGP formation. Moreover, early...
T2K is a long baseline neutrino experiment in Japan producing a beam of (anti-)neutrinos at an accelerator complex and studying their oscillations by comparing the measured (anti-)neutrino spectrum at the near detector ND280 and at the water Cherenkov detector Super Kamiokande (Super-K), located 295 km away. Over the recent years, significant updates were applied to the T2K oscillation...
Cosmic Microwave Background (CMB) photons can undergo resonant conversion into axions in the presence of magnetized plasma distributed inside non-linear Large-Scale Structure (LSS). This process leads to axion-induced patchy screening: secondary temperature and polarization anisotropies with a characteristic non-blackbody frequency dependence that are strongly correlated with the distribution...
The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions of the Standard Model addressing such shortcomings introduce additional Higgs bosons, beyond-the-Standard-Model...
The BDF/SHiP collaboration has proposed a general-purpose intensity-frontier experimental facility operating in beam-dump mode at the 400 GeV CERN SPS accelerator to search for feebly interacting GeV-scale particles and to perform measurements in neutrino physics. CERN is uniquely suited for this programme owing to the proton energy and yield available at the SPS. In March 2024 the facility...
In this work[1], we consider the propagation of QED fermions in the presence of a classical background magnetic field with white-noise stochastic fluctuations. The effects of the magnetic field fluctuations are incorporated into the fermion and photon propagators[3] in a quasiparticle picture, which we developed in previous works [2] using the replica trick. In the very strong-field limit, we...
The inner detector of the present ATLAS experiment has been designed and developed to function in the environment of the present Large Hadron Collider (LHC). At the ATLAS Phase-II Upgrade, the particle densities and radiation levels will exceed current levels by a factor of ten. The instantaneous luminosity is expected to reach unprecedented values, resulting in up to 200 proton- proton...
In this talk, I will review the existing data on hadronization in semi-inclusive DIS off nuclear targets, beginning with the HERMES era, followed by Jefferson Lab CLAS experiment at 6 GeV and the recently realized continuation with 11 GeV beams. A unique feature of semi-inclusive DIS is its ability to investigate time-dependence of color propagation and hadronization processes by embedding it...
Calculating the x-dependence of partonic distribution functions from lattice QCD has become feasible in the last decade due to novel approaches. In this talk, I will present selected advances for extracting PDFs and GPDs at leading twist and beyond. Such progress demonstrates the potential of lattice QCD calculations to complement other theoretical and experimental efforts toward a better...
Generalized Parton Distributions (GPDs) are nowadays the object of an intense effort of research, in the perspective of understanding nucleon structure. They describe the correlations between the longitudinal momentum and the transverse spatial position of the partons inside the nucleon and they can give access to the contribution of the orbital momentum of the quarks and gluons to the nucleon...
I will present ongoing work on light neutralinos with baryon-number-violating R-parity-violating (RPV) couplings at Belle II. Neutralinos can be produced in B-meson decays and subsequently decay into baryon-meson pairs, leading to displaced-vertex (DV) signatures. We employ partial reconstruction techniques to enhance signal efficiency and suppress backgrounds. Using Monte Carlo simulations,...
The COmpact Network of Detectors with Orbital Range (CONDOR) Observatory is dedicated to advancing the study of cosmic rays, with a particular focus on the low-energy regime (~150 GeV). Located in the Atacama Desert, Chile, at 5300 meters above sea level, the observatory benefits from optimal conditions for detecting and analyzing cosmic ray events. In this initial study, we present a detailed...
I will discuss a TeV-scale extension of the Standard Model in which a dark sector facilitates neutrino mass generation radiatively within the context of the linear seesaw mechanism. Since the symmetries of the model prevent tree-level contributions, tiny neutrino masses are generated at one loop due to spontaneous lepton number violation by the expectation value of a Higgs triplet. I will...
Recent high-precision cosmological data tighten the bound to neutrino masses and start rising a tension to the results of lab-experiment measurements, which may hint new physics in the role of neutrinos during the structure formation in the universe. A scenario with massless sterile neutrinos was proposed to alleviate the cosmological bound and recover the concordance in the measurements of...
The High Luminosity phase of the Large Hadron Collider (HL-LHC) will significantly increase its instantaneous luminosity by one order of magnitude, thus enabling unprecedented precision studies of the Standard Model (SM) and searches for Physics beyond the Standard Model (BSM).
To capitalize on this opportunity and address the challenges posed by high pile-up environments, the Compact Muon...
In this talk I will describe an extension of the Standard Model designed to elucidate the fermion mass hierarchy, account for the dark matter relic abundance, and explain the observed matter-antimatter asymmetry in the universe. Beyond the Standard Model particle content, the model introduces additional scalars and fermions. Notably, the light active neutrinos and the first two generations of...
This talk provides an update on the current status of future collider projects, like the Compact Linear Collider (CLIC), the Future Circular Collider (FCC). It briefly outlines their progress and ongoing developments, while also addressing the European Strategy for Particle Physics recommendations.
I this context, Lepton flavour violating Higgs decays could appear in models beyond the...
The Apparatus for Mesons and Baryon Experimental Research (AMBER, NA66) is a high-energy physics experiment at CERN’s M2 beam line. Its broad physics program presently extends beyond 2032 and comprise measurement of the anti-proton production cross-section on He, proton and Deuterium, charge-radius of the proton and Kaon and Pion PDFs using Drell-Yan process. Several major upgrades of the...
The need to interject, process and analyze large datasets in an as-short-as-possible amount of time is typical of big data use cases. The data analysis in High Energy Physics at CERN for instance will require, ahead of the next phase of high-luminosity at LHC, access to big amounts of data (order of 100 PB/year). To address this challenge, together with other key strategic sectors essential...
The study of the nuclear fragmentation of $^{12}$C at the Particle Therapy beam energies is important for the development of even more specific treatment plans and also for the development of range monitoring techniques based on charged secondary particles. In this contribution, the fragmentation cross sections of 115 − 353 MeV/u kinetic energy carbon ion beams impinging over thin targets of...
Long-lived particles are predicted by many Beyond the Standard Model (BSM) theories, such as the Supersymmetry and Hidden Valley Models, and can serve as a viable candidate for the Dark Matters (DM). We have searched for Long-Lived Particles (LLPs) that decays in the muon chambers in the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider with Run 3 Data. The search targets...
Abstract. We explore the meromorphic structure of the ζ-function associated to
the boundary eigenvalue problem of a modified Sturm-Liouville operator subject to
spectral dependent boundary conditions at one end of a segment of length l. We
find that it presents isolated simple poles which follow the general rule valid for second
order differential subject to standard local boundary...
Below the electroweak scale, new physics that violates lepton number in two units ($\Delta L = 2$) and is mediated by heavy particle exchange can be parameterized by a dimension-9 low-energy effective Lagrangian.
Operators in this Lagrangian involving first-generation quarks and leptons contribute to the short-range mechanism of neutrinoless double beta decay ($0\nu\beta\beta$) and therefore...
The effective cross section of double parton scattering in proton collisions has been measured by many experiments with rather different results.
Motivated by this fact, we assumed that the parton correlations in the transverse plane are different whether we have valence or sea partons.
With this simple approach, we were able to fit the available data and found that sea parton pairs...
DAMIC-M (Dark Matter in CCDs at Modane) is a leading experiment that searches for sub-GeV Dark Matter (DM) using Skipper CCDs under the French Alps at the Laboratoire Souterrain de Modane (LSM). The capability of single-electron detection, combined with an extremely low dark current, results in an energy threshold of a few eV. A first prototype phase, the Low Background Chamber (LBC), has been...
Double Parton Scattering (DPS) is an important mechanism through which we can investigate the parton distributions of the proton and the nucleus. Although we know that such scatterings occur in high-energy collisions, the formalism describing them lacks answers to questions such as: Is there a universal effective cross section? To address such questions, we investigate DPS in ultraperipheral...
Semi-inclusive DIS off nuclei plays a central role in studying the spacetime development of hadronization. An important quantity is the distance traveled by the parton before its color neutralization, the so-called production length Lp. We focus on the pt-broadening observable that should offer direct access to the production length. However, while simple calculations work well for HERMES...
SWGO is the international proposal to build a wide-field gamma-ray observatory to explore the Southern Hemisphere sky in the energy range from a few hundred GeV to the PeV. Its objective is to open a new window of astronomical observation, in a domain where observational coverage is currently limited to the northern hemisphere, through the HAWC and LHAASO observatories. SWGO will be installed...
Searches for anomalous neutral triple gauge boson couplings (NTGCs) provide important tests for the gauge structure of the standard model. In SMEFT (“standard model effective field theory”) NTGCs appear only at the level of dimension-8 operators. While the phenomenology of these operators has been discussed extensively in the literature, renormalizable UV models that can generate these...
The Pierre Auger Observatory, the largest and most accurate ultra-high-energy cosmic ray observatory (UHECRs) in the world, located in the province of Mendoza, Argentina, uses a hybrid design composed of two detection systems: a network of 1660 water-Cherenkov detectors, distributed over an area exceeding 3000 km², and 27 fluorescence telescopes that monitor the atmosphere above the surface...
We present recent progress towards the development of 4D-trackers with high granularity in position in time. As future colliders move to higher energy collisions, with increased particle occupancy, the need for 4D (spatial and temporal) tracking systems becomes extremely important to maintain the desired particle reconstruction efficiency. Additionally, the use of timing information is...
The BABAR collaboration has recently presented a dedicated measurement of additional radiation in ISR $e^+e^-\rightarrow\mu^+\mu^-\gamma$ and$e^+e^-\rightarrow\pi^+\pi^-\gamma$ events. Results are presented at next-to- and next-to-next-to-leading order, with one and two additional photons, respectively, for radiation from the initial and final states. Comparison with predictions from the...
The Main Injector Experiment v-A (MINERvA) at Fermilab is a dedicated neutrino-nucleus scattering experiment that employs the NuMI neutrino beam. The MINERvA detector is composed of a fine-grained scintillator tracker with electromagnetic and hadronic calorimetry regions. Upstream of the central tracker, alternating layers of scintillator strips and passive nuclear targets allow for the study...
Superconducting nanowire single photon detectors (SNSPDs) are low-threshold quantum sensors designed to detect UV, optical and infrared photons. SNSPDs have enabled high-fidelity quantum teleportation, deep space optical communications, exoplanet transit spectroscopy, searches for bosonic and fermionic DM, and have recently been proposed to search for quantum gravity in tabletop experiments....
Many early universe theories predict the creation of Primordial Black Holes (PBHs) that could have sufficient mass to be expiring today with a final burst of Hawking radiation. A Black Hole (BH) has a Hawking temperature inversely proportional to its mass. Hence, a sufficiently small BH will quasi-thermally radiate particles at an ever-increasing rate as it evaporates and raises its...
The COmpact Network of Detectors with Orbital Range (CONDOR) Observatory is a future cosmic ray observatory to be constructed at an altitude of 5300 m a.s.l. in the Atacama Desert, making it the highest detector array in the world. CONDOR observatory aims to detect cosmic rays with energies starting at ~100 GeV scale, a range crucial for bridging the gap between satellite and ground-based...
The 2012 discovery of the Higgs boson (H) by the ATLAS and CMS collaborations at the Large Hadron Collider (LHC) marked the beginning of an extensive program aimed at understanding the properties of this fundamental particle. A key aspect still under investigation is the Higgs boson self-interaction, which governs the shape of the Higgs potential, $ V(\phi) $. In the Standard Model (SM),...
The COmpact Network of Detectors with Orbital Range (CONDOR) Observatory is an upcoming cosmic ray detection facility set to be constructed at an altitude of ~5000 meters a.s.l. in the Atacama Desert, making it the highest cosmic rays detector in the world, designed to observe gamma and cosmic rays at the low-energy range (~GeV-Tev). By focusing on this relatively unexplored range, CONDOR is...
The aim of this project is to study the effects of a noisy electric field in a complex scalar field $\lambda\phi^4$ theory, in the context of ultrarelativistic heavy ion collisions. The bosonic propagator in presence of a constant electric field is derived using the Schwinger-Fock proper time method. To consider the fluctuations of the electric field the statistical average of the generating...
Among the $B$ mesons, the $B_c$ meson is unique as it is the only one composed of two different heavy flavors, $b$ and $c$, making its production and detection more challenging than other $b$-flavored mesons. This results in significant uncertainties in its dynamic properties. Consequently, rather than reporting its differential production cross-section, the LHCb collaboration [1] provides the...
Motivated by the remarkable Belle II experimental result on $B\to K^{} E_{\rm miss}$ I review the scenarios that could accomodate the observed deviation and how this correlate with constraints coming other observables induced by flavour changing neutral currents. I discuss the phenomenological difficulties in accommodating it exclusively in terms of processes with SM neutrino final state and...
In previous works it has been shown that a minimalist model for vector dark matter surfers from loss of unitarity because of the coupling between the vector field and the Higgs boson [1].
Nevertheless, algebraic manipulation of the vector sector by mixing the weak interaction fields with the vector dark matter fields reveals a possible path towards an ultraviolet completion. The resulting...
Predictions of processes in perturbative Quantum Chromodynamics (pQCD) critically depend on the appropriate choice of the renormalization scale $\mu_r$ to determine the correct running coupling in the perturbative expansion. In conventional scale setting, this scale is set to the characteristic process value, $Q$, and the uncertainty is estimated by varying $\mu_r$ within an arbitrary range...
The CONDOR (COmpact Network of Detectors with Orbital Range) project aims to establish the highest-altitude observatory for cosmic rays at the Atacama Astronomical Park in northern Chile. Positioned at 5.300 meters, CONDOR will provide unique sensitivity to low-energy cosmic ray (CR) particles, particularly from ~100 GeV, contributing to our understanding of cosmic rays and their interactions...
In this work, we propose to explain the mass hierarchy and mixing pattern in the leptonic sector, we explore an extension of the Standard Model whose scalar sector includes one active and two inert doublets as well as some scalar singlets. The model includes a $S_3$ family symmetry supplemented by extra cyclic symmetries. As a consequence of our construction, a Dark Matter (DM) candidate is...
This work aimed to create a model where the smallness of the neutrino masses has been considered. To achieve this, we have chosen to extend the symmetry group of the SM, which is based on the group $SU(3)_C\times SU(2)_L\times U(1)_Y$, by adding an extra symmetry based on the discrete group $\Delta (27)$, due to the success that this group has presented in the literature and because it is the...
Studies based on employing hard probes and pioneering processes such as semi-inclusive deep inelastic scattering (SIDIS) on atomic nuclei are cogent in accessing medium modifications of their underlying structure, exploring the hadronization mechanisms, and studying confinement dynamics in cold nuclear matter. Indeed, carrying out such studies in a clean environment effectively probes the...
We study light neutralinos ($\tilde \chi_1^0$) with masses of the order of the GeV scale in the context of R-parity-violating (RPV) supersymmetry. For such masses, the neutralinos can become long-lived particles and decay with a macroscopic (order cm) displacement inside LHC detectors. Complementing previous works, we focus on their production through a pair of sleptons ($\tilde e_{L}$) with...
The High-Luminosity Large Hadron Collider (HL-LHC) will demand highly efficient and fast data processing systems to handle unprecedented event rates. In this study, we present a novel approach to real-time classification of Higgs boson production mechanisms—focusing on gluon-gluon fusion (ggF) and vector boson fusion (VBF)—using machine learning (ML) models optimized for deployment on...
We evaluate the polarised Bjorken sum rule (BSR) $\overline{\Gamma}^{p-n}_1(Q^2)$ with truncated Operator Product Expansion (OPE) up to the $D=4$ term [1]. Due to the knowledge of the renormalon structure of the BSR, the leading-twist term of dimension $D=0$ is evaluated using a recently developed renormalon-based resummation [2], in this case with two variants of holomorphic QCD couplings...
The reconstruction of atmospheric showers produced by high-energy gamma rays is an essential point in order to determine the effectiveness and optimize the design and layout of the Southern Wide-field Gamma-ray Observatory (SWGO). While SWGO is dedicated to studying gamma rays from astrophysical sources, cosmic rays introduce significant noise into the data, making it essential to accurately...
