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Title: Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions

Unpolarized and beam-polarized four-fold cross sections $$\frac{d^4 \sigma}{dQ^2 dx_B dt d\phi}$$ for the $$ep\to e^\prime p^\prime \gamma$$ reaction were measured using the CLAS detector and the 5.75-GeV polarized electron beam of the Jefferson Lab accelerator, for 110 ($Q^2,x_B,t$) bins over the widest phase space ever explored in the valence-quark region. Several models of Generalized Parton Distributions (GPDs) describe the data well at most of our kinematics. This increases our confidence that we understand the GPD $H$, expected to be the dominant contributor to these observables. Thus, through a leading-twist extraction of Compton Form Factors, these results reveal a tomographic image of the nucleon.
  1. Institut de Physique Nucleaire, CNRS/IN2P3 and Univ. Paris Sud, Orsay (France). et al.
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-PH--15-2037; DOE/OR/23177--3373; arXiv:1504.02009
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 21; Journal ID: ISSN 0031-9007
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Orgs:
CLAS Collaboration
Country of Publication:
United States