[Rgc] PhD defence

[Samy Polcher Rafael]

Dear all,

I am happy to announce that I will be defending my PhD on the 22nd of September at 2pm CET (8am JLab time). The defense will take place in room 135 at DPhN (Bat.
703 CEA-Saclay), and will also be available at the following link:https://cern.zoom.us/j/68683683907?pwd=ETbIh564c8kSHn9X23bCqovJ8xfjr6.1

Please find the title and abstract of the thesis below.

Best regards,

Samy

Title: Nucleon structure studies: DVCS on polarised protons with the
CLAS12 experiment, and development of Micromegas detectors for EIC

Abstract: The quark and gluon structure of nucleons is crucial for understanding the origin of their mass and spin. This information is encoded in structure function such as Generalised Parton Distributions (GPDs), which provide a three dimensional picture of the nucleon in terms of its constituents. Deeply Virtual Compton Scattering  (DVCS) offers the most direct access to GPDs, but their extraction requires high-precision measurements of multiple observables over a wide kinematic range. In 2022 and 2023 the CLAS12 experiment at Jefferson Laboratory (JLab) collected data from polarised electron scattering on a longitudinally polarised proton target, enabling the first measurement of polarised DVCS asymmetries at JLab 12 GeV kinematics. This thesis will present preliminary measurement of the beam, target and double spin DVCS asymmetries from the CLAS12 polarised proton target data.
Nucleon structure studies will also constitute a major part of the physics program at the future Electron Ion Collider (EIC). The development of the first detector at the EIC is ongoing and it requires light Micro-Pattern Gaseous Detectors (MPGDs) for its tracking system. This thesis further reports initial tests of Micromegas MPGDs with a two-dimensional readout developed for EIC.