Description du sujet de thèse

Understanding of Quantum Chromo-Dynamics (QCD) is a major challenge in low energy particle physics that is nowadays regaining a lot of attention in the scientific community. The lack of comprehension of basic phenomena regarding the internal structure of nucleons, how their mass emerges and how their spin builds up, has driven and still drives an immense experimental effort. Moreover, the understanding of nucleon-nucleon interactions in nuclei -referred to as short range correlations- and how this phenomenon correlates to the fact that the deep inelastic structure functions differ significantly for nuclei of different sizes -known as the EMC effect- stands as a major quest in hadron physics. Experimental facilities like Jefferson laboratory (JLab) and the foreseen Electron-Ion Collider (EIC) are fertile grounds for the experimental search targeting the determination of a large set of structure functions that describe the distribution of the nucleon constituents (the partons) in the momentum and configuration spaces. In particular, the future EIC will be a groundbreaking particle accelerator designed to explore the inner structure of protons and nuclei. By colliding high-energy electrons with ions, it aims to unravel the mysteries of QCD and the strong nuclear force. The EIC will provide insights into the building blocks of matter, potentially transforming our understanding of the universe.

The thesis project separates into two complementary parts that are to be carried out in parallel. The first one consists in analyzing already existing fully calibrated data for Deeply Virtual Compton Scattering (DVCS) from the CLAS12 experiment at JLab and the second one is to perform instrumentation work for the EIC electromagnetic calorimeter and simulation studies in preparation of the EIC detector.
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-EPJA 52, 268 (2016)
-Nature 566, 354–358 (2019)
-Nature 560, 617–621 (2018)
-PRL 96, 082501 (2006)
-arXiv:2305.13666
-arXiv:2305.18112
-arXiv:2410.08384
-Phys. Lett. B 123, 275-278 (1983)
-Phys. Lett. B 202, 603-610 (1988)

Contexte de travail

The Irène Joliot-Curie Physics Laboratory of 2 Infinities (IJCLab) is a UMR under the supervision of the CNRS (IN2P3), the University of Paris-Saclay and the University of Paris is located on the campus of the University of Paris -Saclay in Orsay. The laboratory is located on the campus of the Université Paris-Sud, Université Paris-Saclay in Orsay. The campus is located 20 km south of Paris and easily accessible by RER in 35 minutes.
IJCLab was born in 2020 from the merger of five units (CSNSM, IMNC, IPN, LAL, LPT). The staff is made up of nearly 560 permanent (340 engineers, technicians and administrators and 220 researchers and teacher-researchers) and approximately 200 non-permanent including 120 doctoral students. The research themes of the laboratory are nuclear physics, high energy physics, theoretical physics, astroparticles, astrophysics and cosmology, particle accelerators, energy and the environment and health. IJCLab has very significant technical capacities (around 280 IT) in all the major fields required to design, develop / implement the experimental devices necessary for its scientific activity, as well as the design, development and use of instruments. .
The PhD student will work in the JLab/EIC group of the PHE scientific Pole of the Laboratory.
The group includes around 11 physicists (6 permanent researchers, 2 post-docs and 3 doctoral students).
The student will be part of the CLAS collaboration at Jefferson Lab and the EIC collaboration.
IJCLAB bases its recruitment policy on the promotion of equality, diversity and inclusion. Essential values, they allow the professional development of agents, who are real actors in a collective success, but also the development of the laboratory itself.

Le poste se situe dans un secteur relevant de la protection du potentiel scientifique et technique (PPST), et nécessite donc, conformément à la réglementation, que votre arrivée soit autorisée par l'autorité compétente du MESR.

Contraintes et risques

The successful candidate shall be enrolled on a PhD program of the Pheniics doctoral school. Regular travel to the USA should be expected for participations to collaboration meeting and work on place. Travel is expected to present results at international conferences.