This study focuses on the Single Event Sensitivity (SES) of the MEGII apparatus concerning a muon's charged Lepton Flavour Violating (cLFV) three-body decay involving an Axion-like particle (ALP). Many theories beyond the Standard Model (SM) predict this decay, which does not exist in the SM. Observing this decay would provide compelling evidence of New Physics.
The decay under...
Supersymmetry (SUSY) models with nearly mass-degenerate higgsinos could solve the hierarchy problem as well as offer a suitable dark matter candidate consistent with the observed thermal-relic dark matter density. However, the detection of SUSY higgsinos at the LHC remains challenging especially if their mass-splitting is O(1 GeV) or lower. A novel search using proton-proton collision data...
Recently, the BESIII collaboration has produced new data for the $\Lambda$ baryon electric and magnetic form factor's ratio $G_E^\Lambda/G_M^\Lambda$ with high accuracy. By assuming the analyticity of the baryon form factors, a dispersive procedure can be used can be used to determine the modulus and the phase determination of the form factor's ratio, based on a set of theoretical an...
Establishing the physics potential of future colliders is one of the main objectives of the HEP community in the coming years. The aim is on the one hand to consolidate the physics expectations from a circular collider working between the Z-pole and the ttbar threshold (FCC-ee at CERN) and exploring completely new avenues and technologies such as a multi-TeV e+e- or even mu+mu- collider. In...
The NA62 experiment at the Super Proton Synchrotron at CERN is designed to measure the branching ratio of the ultra-rare channel $K^+ \rightarrow \pi^+\nu \bar{\nu}$ with BR = $(8.6 \pm 0.42)\times 10^{-11}$. The GigaTracker, a silicon pixel detector, measures the momentum and direction of incoming hadron beam particles at a rate of 750 MHz.
The success of the experiment relies on effectively...
TWOCRYST is a proof-of-principle test in Run3 for the proposed ALADDIN experiment, for the direct measurement the dipole moments of charm baryons at LHC. A silicon pixel detector for the measurement of signal charm baryons is under construction. It is based on the LHCb VELO pixel sensors and readout system and it will work in the secondary vacuum of a Roman Pot, positioned inside the LHC beam...
The LHCb experiment is designed to perform flavour physics measurements at the Large Hadron Collider. The latest results obtained by the LHCb experiment in studying $H_b\to h^+h'{}^-$ decays, where $H_b$ can be either a $B^0$ meson, a $B_s^0$ meson or a $\Lambda_b^0$ baryon, while $h$ and $h'$ stand for $\pi$, $K$ or $p$, will be presented. Such decays are sensitive probes of the...
The MUonE experiment aims to measure the hadronic vacuum polarization contribution to the muon anomaly $a_\mu^{HLO}$ better than $1\%$. An innovative approach is proposed, using elastic scattering of 160 GeV muons on atomic electrons in a low-Z target. A precision of 10ppm on the angular distribution of the scattering particles in the muon-electron scattering process is required. The M2...
Studying physics at high intensity is requiring HEP experiments to continuously push the frontier of data acquisition. With ever increasing data rates, reconstruction and trigger systems need to be reconsidered up to their fundamental architectures and new solutions have to be sought after. The “Artificial Retina” architecture answers this call, offering a high-parallelised tracking system...
To ensure the necessary precision for the $K \to \pi \nu \bar\nu$ analysis, the NA62 kaon identification detector is required to have a time resolution better than 100 ps, at least 95% kaon tagging efficiency, and a pion mis-identification probability of less than $10^{-4}$. For data collected up to 2022, the tagging of kaons in the NA62 beam has been performed with a Cherenkov detector filled...
During Runs 5 and 6, the LHCb experiment at CERN will operate at a luminosity up to $1.5 \times 10^{34}$ cm$^{-2}$s$^{-1}$, requiring substantial upgrades to its Electromagnetic Calorimeter (ECAL) to handle high radiation doses and achieve time resolutions of few tens of picoseconds mitigating pile-up effects.
The detector under development is a Spaghetti Calorimeter (SpaCal) composed of...
This analysis aims to a comprehensive study of the decay kinematics of the semileptonic decay $B_s^0 \rightarrow D_s^* \mu \nu$, with $D_s^* \rightarrow D_s \gamma$ and $D_s \rightarrow K^- K^+ \pi$, using data collected by LHCb in Run 2. The study of semileptonic decays of $B_s^0$ meson plays a crucial role in the validation of the Standard Model, since these help to constrain the parameters...
High-precision measurements of CP violation in charm decays are of paramount importance, since physical CP-violating asymmetries are highly suppressed in the Standard Model, at the level of ($10^{-3} –10^{-4}$) and even lower for the time-dependent observables.
The first observation of CP violation in the charm sector, with the famous $\Delta A_{CP}$ mechanism, $\Delta A_{CP}= a_d(KK)-...
The Upstream Tracker is a critical component of the tracking system in the LHCb Upgrade I detector. It has been commissioned and is now operational, collecting data during Run 3. The tracker enhances the reconstruction of charged particle tracks and long-lived particles, such as $\Lambda$ and $K_S^0$, thereby improving the performance of the software trigger. This presentation will cover...
The LHCb experiment was designed to play a crucial role in particle physics and flavour physics research. Since its beginning, LHCb has performed high-precision measurements of CP violation in decays of hadrons containing the charm quark, observing direct CP violation in the decays of the D0 meson into two charged particles for the first time in 2019. However, CP violation in baryon decays has...
