Dissertation/ Thesis
Deeply virtual Compton scattering at Jefferson Lab ; Diffusion Compton profondément virtuelle au Jefferson laboratory
| العنوان: | Deeply virtual Compton scattering at Jefferson Lab ; Diffusion Compton profondément virtuelle au Jefferson laboratory |
|---|---|
| المؤلفون: | Georges, Frédéric |
| المساهمون: | Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, Carlos Muñoz Camacho |
| المصدر: | https://theses.hal.science/tel-01925350 ; High Energy Physics - Experiment [hep-ex]. Université Paris-Saclay, 2018. English. ⟨NNT : 2018SACLS391⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Hadronic physics, Generalized Parton Distributions (GPD), Nucleon structure, Jefferson Lab (CEBAF), Simulation, Deeply Virtual Compton Scattering (DVCS), Diffusion Compton Profondément Virtuelle (DVCS), Physique hadronique, Distributions de Partons Généralisées (GPD), Structure du Nucléon, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] |
| الوصف: | Introduced in the mid 90’s, Generalized Parton Distributions (GPDs) are now a key element in the study of the nucleon internal structure. GPDs are a generalization of Form Factors and Parton Distribution Functions. They encapsulate both spatial and momentum distributions of partons inside a nucleon, allowing to perform its three-dimensional tomography. Furthermore, they allow to derive the total orbital angular momentum of quarks through the Ji sum rule, which is a crucial point to unravel the nucleon spin structure. By providing a more complete description of hadrons in terms of quarks and gluons, a deeper understanding of Quantum Chromodynamics can be reached.GPDs are experimentally accessible through deeply exclusive electro-production processes, and one of the simplest channels available is Deeply Virtual Compton Scattering (DVCS). A worldwide experimental program was started in the early 2000’s to extract these GPDs. The DVCS experiment E12-06-114 performed at Jefferson Laboratory Hall A (Virginia, USA) between 2014 and 2016, is encompassed in this program. The aim of this experiment is to extract with high precision the DVCS helicity-dependent cross sections as a function of the momentum transfer Q², for fixed values of the Bjorken variable xBj, on a proton target. The recent upgrade of the accelerator facility to 12 GeV allows to cover a larger Q² range than in previous measurements and probe yet unexplored kinematic regions, while the polarized electron beam allows the separation of the contributions from the real and imaginary parts of the DVCS amplitude to the total cross section. In this document, a brief summary of the worldwide experimental program for the study of GPDs will be provided, followed by a description of the E12-06-114 apparatus and data analysis. Finally, the results of the unpolarized and polarized cross-section measurements are presented and compared to a few selected models. ; Introduites au milieu des années 90, les Distributions Généralisées de Partons (GPD) sont aujourd'hui un ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| Relation: | NNT: 2018SACLS391; tel-01925350; https://theses.hal.science/tel-01925350; https://theses.hal.science/tel-01925350/document; https://theses.hal.science/tel-01925350/file/70977_GEORGES_2018_archivage.pdf |
| الاتاحة: | https://theses.hal.science/tel-01925350 https://theses.hal.science/tel-01925350/document https://theses.hal.science/tel-01925350/file/70977_GEORGES_2018_archivage.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.B613D888 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |