Deeply Virtual Compton Scattering at Hall A, Jefferson Lab

Hashir Rashad, Mohamed Nuhman

doi:10.25777/z7th-my96

Title: Deeply Virtual Compton Scattering at Hall A, Jefferson Lab

Thesis/Dissertation · Tue Dec 01 00:00:00 EST 2020

DOI:https://doi.org/10.25777/z7th-my96· OSTI ID:1764682

Hashir Rashad, Mohamed Nuhman ^[1]

Old Dominion Univ., Norfolk, VA (United States)

The Standard Model of particle physics de?nes quarks and leptons as the basic building blocks of all matter. The interaction between them are mediated by force carrying gauge bosons. Quantum Chromo Dynamics (QCD), the theory that explains the strong interaction is still not complete enough to derive the physical observables of a Quark-Gluon system from the fundamental degrees of freedom of its constituents. Experimentally observable single particle densities provide important insights into our understanding of the quark-gluon system and hence help fill in the gaps of QCD. Generalized Parton Distributions (GPDs) provide simultaneous information of both spacial and longitudinal momentum distributions of constituents of a quark-gluon system. Deeply Virtual Compton Scattering (DVCS) is understood to be the simplest and cleanest process to access GPDs. Even though the exclusive DVCS is simple to understand, the experimental process however, is complex with the Bethe-Heitler and e + p ? e + ? + N? being in the mix of the electron proton scattering e+p ? e+?+X. Over the years, 3 generations of DVCS experiments have been conducted in the Experimental Hall-A of Thomas Jefferson National Accelerator Facility (JLab). This thesis presents the extraction of DVCS cross section in 9 total kinematic points from the 3rd generation experiment (DVCS3) conducted after the 12 GeV upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) of JLab during Fall 2014 - Fall 2016.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

DOE Contract Number:: AC05-06OR23177

OSTI ID:: 1764682

Report Number(s):: JLAB-PHY-20-3308; DOE/OR/23177-5129

Country of Publication:: United States

Language:: English

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