skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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.

Authors:
 [1]
  1. Institut de Physique Nucleaire, CNRS/IN2P3 and Univ. Paris Sud, Orsay (France). et al.
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Org.:
CLAS Collaboration
OSTI Identifier:
1226143
Alternate Identifier(s):
OSTI ID: 1226380
Report Number(s):
JLAB-PH-15-2037; DOE/OR/23177-3373; arXiv:1504.02009
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 21; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Jo, Hyon -Suk. Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.212003.
Jo, Hyon -Suk. Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions. United States. doi:https://doi.org/10.1103/PhysRevLett.115.212003
Jo, Hyon -Suk. Tue . "Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions". United States. doi:https://doi.org/10.1103/PhysRevLett.115.212003. https://www.osti.gov/servlets/purl/1226143.
@article{osti_1226143,
title = {Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions},
author = {Jo, Hyon -Suk},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.115.212003},
journal = {Physical Review Letters},
number = 21,
volume = 115,
place = {United States},
year = {2015},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
journal, January 1994

  • Müller, D.; Robaschik, D.; Geyer, B.
  • Fortschritte der Physik/Progress of Physics, Vol. 42, Issue 2
  • DOI: 10.1002/prop.2190420202

Gauge-Invariant Decomposition of Nucleon Spin
journal, January 1997


Deeply virtual Compton scattering
journal, June 1997


Scaling limit of deeply virtual compton scattering
journal, July 1996


Nonforward parton distributions
journal, November 1997


Hard exclusive reactions and the structure of hadrons
journal, January 2001


Generalized parton distributions
journal, December 2003


Generalized Parton Distributions
journal, December 2004


Unraveling hadron structure with generalized parton distributions
journal, October 2005


Generalized parton distributions in the valence region from deeply virtual compton scattering
journal, May 2013


Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
journal, December 2006


Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries
journal, April 2008


Longitudinal Target-Spin Asymmetries for Deeply Virtual Compton Scattering
journal, January 2015


Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements
journal, October 2001


Measurement of Deeply Virtual Compton Scattering with a Polarized-Proton Target
journal, August 2006


Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV
journal, September 2009


The CEBAF large acceptance spectrometer (CLAS)
journal, May 2003

  • Mecking, B. A.; Adams, G.; Ahmad, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 503, Issue 3
  • DOI: 10.1016/S0168-9002(03)01001-5

Radiative effects in the processes of exclusive photon electroproduction from polarized protons
journal, March 2012


Hard Electroproduction of Photons and Mesons on the Nucleon
journal, June 1998


Deeply virtual electroproduction of photons and mesons on the nucleon: Leading order amplitudes and power corrections
journal, October 1999


Nucleon form factors from generalized parton distributions
journal, September 2005


From hard exclusive meson electroproduction to deeply virtual Compton scattering
journal, January 2013


Deeply virtual Compton scattering at small and the access to the GPD H
journal, December 2010


Double distributions and evolution equations
journal, December 1998


Symmetries and structure of skewed and double distributions
journal, March 1999


Complex conformal spin partial wave expansion of generalized parton distributions and distribution amplitudes
journal, April 2006


Measurement of the Beam-Spin Azimuthal Asymmetry Associated with Deeply-Virtual Compton Scattering
journal, October 2001


Beam-helicity and beam-charge asymmetries associated with deeply virtual Compton scattering on the unpolarised proton
journal, July 2012

  • Airapetian, A.; Akopov, N.; Akopov, Z.
  • Journal of High Energy Physics, Vol. 2012, Issue 7
  • DOI: 10.1007/JHEP07(2012)032

Exclusive leptoproduction of real photons on a longitudinally polarised hydrogen target
journal, June 2010

  • Airapetian, A.; Akopov, N.; Akopov, Z.
  • Journal of High Energy Physics, Vol. 2010, Issue 6
  • DOI: 10.1007/JHEP06(2010)019

Measurement of azimuthal asymmetries with respect to both beam charge and transverse target polarization in exclusive electroproduction of real photons
journal, June 2008


Measurement of double-spin asymmetries associated with deeply virtual Compton scattering on a transversely polarized hydrogen target
journal, October 2011


Beam-charge azimuthal asymmetry and deeply virtual Compton scattering
journal, January 2007


Nuclear-mass dependence of azimuthal beam-helicity and beam-charge asymmetries in deeply virtual Compton scattering
journal, March 2010


Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction
journal, October 2012

  • Airapetian, A.; Akopov, N.; Akopov, Z.
  • Journal of High Energy Physics, Vol. 2012, Issue 10
  • DOI: 10.1007/JHEP10(2012)042

Measurement of deeply virtual Compton scattering at HERA
journal, October 2003


A fitter code for Deep Virtual Compton Scattering and Generalized Parton Distributions
journal, September 2008


A fitter code for Deep Virtual Compton Scattering and Generalized Parton Distributions
journal, March 2009


Generalized Parton Distributions from Deeply Virtual Compton Scattering at HERMES
journal, July 2009


Generalized parton distributions from deep virtual compton scattering at CLAS
journal, May 2010


Measurement of deeply virtual Compton scattering at HERA
journal, September 2001


Gauge-invariant decomposition of nucleon spin
journal, June 2010


Deeply virtual Compton scattering
journal, November 2015


    Works referencing / citing this record:

    Experimental overview of Deeply Virtual Compton Scattering
    journal, June 2016

    • d’Hose, Nicole; Niccolai, Silvia; Rostomyan, Armine
    • The European Physical Journal A, Vol. 52, Issue 6
    • DOI: 10.1140/epja/i2016-16151-9

    Forces inside hadrons: Pressure, surface tension, mechanical radius, and all that
    journal, September 2018

    • Polyakov, Maxim V.; Schweitzer, Peter
    • International Journal of Modern Physics A, Vol. 33, Issue 26
    • DOI: 10.1142/s0217751x18300259

    From Bethe–Salpeter Wave functions to Generalised Parton Distributions
    journal, June 2016


    Exploring the Structure of the Bound Proton with Deeply Virtual Compton Scattering
    journal, July 2019


    Experimental overview of Deeply Virtual Compton Scattering
    journal, June 2016

    • d’Hose, Nicole; Niccolai, Silvia; Rostomyan, Armine
    • The European Physical Journal A, Vol. 52, Issue 6
    • DOI: 10.1140/epja/i2016-16151-9

    Forces inside hadrons: Pressure, surface tension, mechanical radius, and all that
    journal, September 2018

    • Polyakov, Maxim V.; Schweitzer, Peter
    • International Journal of Modern Physics A, Vol. 33, Issue 26
    • DOI: 10.1142/s0217751x18300259

    The pressure distribution inside the proton
    journal, May 2018


    Measurability of pressure inside the proton
    journal, June 2019


    The electron–ion collider: assessing the energy dependence of key measurements
    journal, January 2019

    • Aschenauer, E. C.; Fazio, S.; Lee, J. H.
    • Reports on Progress in Physics, Vol. 82, Issue 2
    • DOI: 10.1088/1361-6633/aaf216

    Exclusive η electroproduction at W > 2 GeV with CLAS and transversity generalized parton distributions
    journal, March 2017


    Matching generalized parton quasidistributions in the RI/MOM scheme
    journal, August 2019


    Tomographic image of the proton
    journal, January 2017


    D term and the structure of pointlike and composed spin-0 particles
    journal, December 2017


    Dynamic origins of fermionic D -terms
    journal, March 2018


    Twist-3 generalized parton distributions in deeply-virtual Compton scattering
    journal, July 2018


    First Exclusive Measurement of Deeply Virtual Compton Scattering off He 4 : Toward the 3D Tomography of Nuclei
    journal, November 2017


    GPD phenomenology and DVCS fitting: Entering the high-precision era
    journal, June 2016

    • Kumerički, Krešimir; Liuti, Simonetta; Moutarde, Hervé
    • The European Physical Journal A, Vol. 52, Issue 6
    • DOI: 10.1140/epja/i2016-16157-3