Dissertation/ Thesis
Study of Deeply Virtual Compton Scattering at COMPASS at CERN ; Etude de la diffusion Compton profondément virtuelle dans l’expérience COMPASS au CERN
| العنوان: | Study of Deeply Virtual Compton Scattering at COMPASS at CERN ; Etude de la diffusion Compton profondément virtuelle dans l’expérience COMPASS au CERN |
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| المؤلفون: | Ventura, Brian |
| المساهمون: | Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Paris-Saclay, Nicole D'Hose |
| المصدر: | https://theses.hal.science/tel-03612938 ; High Energy Physics - Experiment [hep-ex]. Université Paris-Saclay, 2021. English. ⟨NNT : 2021UPASP125⟩. |
| بيانات النشر: | CCSD |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Deeply Virtual Compton Scattering, Internal structure of the nucleon, Generalised Partons Distributions, COMPASS, Diffusion Compton, Structure interne du nucléon, Distributions de partons Généralisées, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] |
| الوصف: | Although protons and neutrons are known to be the main constituents of the visible matter in the universe, they still remain nowadays a conundrum in modern physics. These constituents of matter are actually made out of quarks and gluons (gathered under the denomination of partons), and are governed by the laws of quantum chromodynamics (QCD). Nevertheless at energies close to the proton mass, the usual perturbative methods cannot be used, and the partons dynamics is therefore orchestrated by structure functions called Generalised Partons Distributions (GPDs). These functions provide information on the longitudinal momentum and transverse position of quarks and gluons, including their correlations. GPDs can be studied through the Deeply Virtual Compton Scattering process (DVCS), where the proton is probed by a virtual photon, in order to produce a real photon in the final state and a recoil of the proton remaining intact.In particular, this process is studied in the COMPASS experiment at CERN, where a polarised muon beam of 160 GeV interacts on a liquid hydrogen target. All the involved particles are detected in this process: the magnetic guidance system before the target allows to measure the incident muon, while the diffracted muon and the photon are detected in the forward spectrometer and the three electromagnetic calorimeters. The recoiled proton is detected in a time of flight detector placed around the target. This thesis shows the most recent results on the DVCS analysis in the COMPASS experiment, based on the 2016 and 2017 data taking. After the introduction of GPDs and their link with the DVCS process, the experimental situation will be depicted. In particular, the emphasis will be put on the calibrations of the time of flight detector and the electromagnetic calorimeters. In addition, an optimisation procedure called kinematic fitting will be detailed in order to improve the measured resolutons on the observables. A detail comparison between the data and a Monte Carlo simulation will be performed in ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| Relation: | NNT: 2021UPASP125 |
| الاتاحة: | https://theses.hal.science/tel-03612938 https://theses.hal.science/tel-03612938v1/document https://theses.hal.science/tel-03612938v1/file/107020_VENTURA_2021_archivage.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.CE0DE42 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |