General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DRF-24-0328
Direction
DRF
Thesis topic details
Category
Corpuscular physics and outer space
Thesis topics
Accessing the 3D structure of pions with CLAS12
Contract
Thèse
Job description
In collaboration with the Thomas Jefferson Laboratory (JLab) in the USA, the researchers in the laboratory of nucleon structure at Irfu want to understand how quarks and gluons interact to form hadrons such protons, neutrons and pions. At JLab, a 11-GeV electron beam is impinged on a proton target. The protos are constituted of three quarks surrounded by a cloud of quark/antiquark pairs whose quantum numbers are similar to pions. The electrons of the beam will interact with these pairs with a structure analogous to a pion. More specifically, we are interested in the deeply virtual Compton scattering (DVCS) giving correlations between longitudinal momentum and transverse position of quarks in a pion. In other words, we are going to perform the very first 3D study of the pion structure. The PhD student will analyze data already available to isolate the DVCS events. A digital twins of the Monte-Carlo simulation/reconstruction chain will be produced with a conditional Generative Adversarial Network in order to caracterize faster and more accurately the background and, in the end, subtract it. The PhD student will travel two to three times a year to JLab, participating to the data taking as well as attending the collaboration meeting. The results will be presented in international conferences and published in peer-reviewed journals.
University / doctoral school
PHENIICS (PHENIICS)
Paris-Saclay
Thesis topic location
Site
Saclay
Requester
Position start date
01/10/2024
Person to be contacted by the applicant
DEFURNE Maxime maxime.defurne@cea.fr
CEA
DRF/IRFU/DPhN/LSN
IRFU/Service de Physique Nucléaire
CEA, Centre de Saclay
F-91191 Gif-sur-Yvette
01 69 08 32 37
Tutor / Responsible thesis director
NEYRET Damien damien.neyret@cea.fr
CEA
DRF/IRFU/DPhN/LSN
IRFU/DPhN bat 703
CEA Saclay
91191 Gif sur Yvette cedex
01 69 08 75 52
En savoir plus
https://irfu.cea.fr/dphn/