Background studies for the CROSS, CUPID-Mo and CUPID neutrinoless double beta decay experiments

• Léonard Imbert

Room: 100/-1-A900 - Auditorium Joliot Curie

Contribution to the construction of the pixel detector of the ATLAS experiment for the HL-LHC

• Yahya Khwaira (IJC LAB - Laboratoire de Physique des 2 Infinis Irène Joliot Curie)

Room: 100/-1-A900 - Auditorium Joliot Curie

Measurement of the Higgs couplings using diphoton channel with ATLAS full Run 2 data

• Oleksii Lukianchuk (IJCLab)

Room: 100/-1-A900 - Auditorium Joliot Curie

Off-shell Higgs into 4 leptons using EFTs and Simulation-Based Inference & electron tracking in ATLAS (ITk)

• Arnaud Maury (IJCLab)

Room: 100/-1-A900 - Auditorium Joliot Curie The discovery of the Higgs was first made in the Higgs-to-4-lepton (H4l) decay channel, almost 10 years ago. Yet, new possibilities of analysis are still available in this channel. They lay beyond the on-shell data by studying the off-shell Higgs, defined as having a centre-of-mass energy above 220 GeV. In particular, we shall use the framework of EFTs (Effective Field Theory) which aims to better understand the deviations of data relative to the Standard Model. The goal is to generate trustworthy Monte-Carlo samples for the relevant EFT operators in order to fit data and measure the Wilson coefficients for those operators. In this work so far, we have focused on the Monte-Carlo generation process in order to compare and validate several software versions. The process of linking experimental data back to the theory parameters is called inference, using a function called the likelihood. The complexity of this problem of HEP is such that the likelihood cannot be calculated analytically: this problem is intractable. Simulation-based inference is a promising method to extract the most information possible from the available data. At the future HL-LHC, the ITk (Inner Tracker) is scheduled to replace and upgrade the current Inner Detector. The ATLAS tracking software was reworked into an experiment-independent software collaboration called ACTS (A Common Tracking Software), with the idea of future implementation of multi-threading and Machine Learning. The ACTS is therefore being reintegrated into the Athena, ATLAS’ software framework. Tracking is particularly challenging for the electron because of increased brehmstrallung, as the particle loses energy as it progresses in the tracker. The Gaussian Sum Filter (GSF) fitter, which exists in the ATLAS software, is being implemented and optimized into ACTS. The GSF fitter from ACTS must therefore be validated and compared to the reference track fitting algorithm in ACTS (called the CKF) and to the existing GSF fitter from ATLAS.

Charmonium production as a function of charged- particle multiplicity with the ALICE experiment at the LHC

• Theraa TORK (IJCLab)

Room: 100/-1-A900 - Auditorium Joliot Curie

Vidya Sagar Vobbilisetti - Search for $B^+ \to K^+ \tau^+ \tau^-$ at Belle II

• Vidya Sagar VOBBILISETTI (This is the correct one)

Room: 100/-1-A900 - Auditorium Joliot Curie

Felicia Carolin Volle - Angular analysis of $\Lambda_b \to \Lambda(1520) \mu^+ \mu^-$

• Felicia Volle

Room: 100/-1-A900 - Auditorium Joliot Curie

Volume de relaxation des défauts cristallins dans le fer

• Mohamed El Bakouri El Haddaji

Room: 100/-1-A900 - Auditorium Joliot Curie

Sami Habet

• Sami HABET (IJCLab)

Room: 100/-1-A900 - Auditorium Joliot Curie