https://doi.org/10.1140/epja/s10050-021-00551-3
Regular Article - Experimental Physics
Double deeply virtual Compton scattering with positron beams at SoLID
1
Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France
2
Duke University, 27708, Durham, NC, USA
3
Thomas Jefferson National Accelerator Facility, 23606, Newport News, VA, USA
4
Faculté des Sciences de Monastir, 5000, Monastir, Tunisia
5
Temple University, 19122, Philadelphia, PA, USA
Received:
8
March
2021
Accepted:
5
July
2021
Published online:
19
July
2021
Double Deeply Virtual Compton Scattering (DDVCS) is the only experimental channel for the determination of the dependence of the Generalized Parton Distributions (GPDs) on both the average and the transferred momentum independently. The physics observables of the electron induced di-muon production reaction 
off unpolarized hydrogen are discussed. Their measurement with the high luminosity and large acceptance SoLID spectrometer at the Thomas Jefferson National Accelerator Facility, using polarized and unpolarized positron and electron beams at 11 GeV is investigated. This experimental configuration is shown to provide unprecedented access to the GPDs with the determination of the real and imaginary parts of the Compton Form Factor 
in an unexplored phase space, and to enable an exploratory investigation of higher twist effects.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
