Vidéo du LAPP


Plaquette du LAPP


Rapport d'activité LAPP

Rapport d'activité



Accueil du site > Formation > Thèses - Stages de M2 & ingénieur

M2 - Moving electroweak precision measurements forward at LHC

mis à jour le

Electroweak (EW) precision measurements at the Large Hadron Collider (LHC) exhibit the major success of the Standard Model of particle physics (SM) by testing the key sector of this theory. Not only they provide solid background estimates to searches of physics effects beyond the SM and to new Higgs measurements but they pursue the fine understanding of EW mechanisms and of the completeness of the theory through the multi-boson interactions. LHC Run-3 data will for instance permit a deeper characterisation of polarisation phenomena in vector bosons scattering processes using machine learning. The ATLAS detector as it will be upgraded using new « Phase-2 » sub-detectors for the High-Luminosity runs of the LHC (HL-LHC) starting in 2029 will allow for enlarging the geometrical coverage of EW measurements in its forward region then providing unique and new handles on subtle effects. However, the assembly of the information from the future sub-detectors in order to identify particles produced in collisions will require new reconstruction techniques based on new machine learning techniques that need to be developed in the coming years. Starting from dibosons analyses carried out in the ATLAS group at LAPP in Annecy, located 50 km far from CERN where the experiment collect collisions data, this project will focus on exploring their improvement when extending it to the full potential of the future Phase-2 ATLAS detector.

Op7onal informa7on on a possible PhD subject : Funding is granted in order to potentially extend the M2 internship into a PhD focused on the measurements of EW processes such as the vector boson scattering and the development of the collision event reconstruction using machine learning techniques to improve the interpretation of the information from current and future ATLAS’ sub-detectors. The student will be involved in the analysis of the data from the LHC Run-3 that has just started and in the operations of the current ATLAS Liquid Argon calorimeter, both serving the background work on the optimisation of the performance of the event reconstruction with the Phase-2 detector. The PhD student could also be involved in some technical work related to the upgrade of the ATLAS calorimeter electronics that the LAPP group is committed to. The duration of the thesis is three years with a possible extended stay at CERN. The proximity of LAPP to CERN facilitates the direct involvement of the student in the life of the experiment, including shifts and collaboration meetings. Communication with theorists is also facilitated by the presence of the theoretical physics laboratory, LAPTh, in the same building and the student will join a group of LAPP- based experts in electron/photon reconstruction and identification as well as calorimetry.

o Level : Master 2 internship, can be followed by a PhD

o Date of the internship : spring 2023

o Supervisor : O. Arnaez, E. Sauvan

o Phone : 04 50 09 17 85

o e-mail :