https://doi.org/10.1140/epja/s10050-021-00581-x
Regular Article - Experimental Physics
Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab
1
Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue, 23606, Newport News, VA, USA
2
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
3
Faculté des Sciences de Monastir, Bitola, Tunisia
4
The Catholic University of America, 20064, Washington, DC, USA
5
A. Alikhanyan National Laboratory, Yerevan Physics Institute, 375036, Yerevan, Armenia
6
Old Dominion University, 23529, Norfolk, VA, USA
7
Ohio University, 45701, Athens, OH, USA
8
Florida International University, 33199, Miami, FL, USA
9
The George Washington University, 20052, Washington, DC, USA
10
University of New Hampshire, 03824, Durham, NH, USA
11
Idaho State University, 83209, Pocatello, ID, USA
12
University of Glasgow, G12 8QQ, Glasgow, UK
13
University of Virginia, 22904, Charlottesville, VA, USA
14
Universität Gießen Luwigstraße 23, 35390, Giessen, Deutschland
15
Facility for Rare Isotope Beams, Michigan State University, 640 South Shaw Lane, 48824, East Lansing, MI, USA
16
Istituto Nazionale di Fisica Nucleare, Sezione di Catania, 95123, Catania, Italy
17
Mississippi State University, 39762, Starkville, MS, USA
18
University of Colorado, 80309, Boulder, CO, USA
19
Stony Brook University, 11794, Stony Brook, NY, USA
20
James Madison University, 22807, Harrisonburg, VA, USA
21
Faculty of Mathematics and Physics, University of Ljubljana, 1000, Ljubljana, Slovenia
22
Akdeniz Üniversitesi, Konyaalti, 07070, Antalya, Turkey
23
Hampton University Hampton, 23668, Hampton, VA, USA
24
Commissariat à l’Energie Atomique, 91191, Gif-sur-Yvette, France
Received:
13
May
2021
Accepted:
26
August
2021
Published online:
29
October
2021
We propose to use the High Momentum Spectrometer of Hall C combined with the Neutral Particle Spectrometer (NPS) to perform high precision measurements of the Deeply Virtual Compton Scattering (DVCS) cross section using a beam of positrons. The combination of measurements with oppositely charged incident beams is the only unambiguous way to disentangle the contribution of the DVCS
term in the photon electroproduction cross section from its interference with the Bethe-Heitler amplitude. This provides a stronger way to constrain the Generalized Parton Distributions of the nucleon. A wide range of kinematics accessible with an 11 GeV beam off an unpolarized proton target will be covered. The 
dependence of each contribution will be measured independently.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
