Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab

A Afanasev,R Rondon,P Chatagnon,S Habet,K Price,S Ali,L Causse,M Kerver,M Defurne,M Muhoza,S Zhamkochyan,G Niculescu,E Voutier,S Širca,E Kinney,D Dutta,A Asaturyan,R Novotny,W J Briscoe,H Voskanyan,P Markowitze,A Mkrtchyan,M Caudron,B Wojtsekhowski,C Muñoz Camacho,A Hobart,H.-S Ko,J Grames,A Camsonne,S Niccolai,V Tadevosyan,I Albayrak,J Zhang,T Horn,D Keller,M Carmignotto,V V Berdnikov,G Kalicy,M Mccaughan,A Somov,H Mkrtchyan,J R M Annand,B Mckinnon,M A I Fernando,M Guidal,V Sergeyeva,C Keppel,R Paremuzyan,J Roche,D Day,R Ent,R Dupré,B Sawatzky,H Rashad,R Trotta,D Marchand,C Zorn,M Mazouz,M Ehrhart,D Hamilton ,J J Murphy ,Tony A Forest ,Shengying Zhao ,Stefan Diehl ,I I Strakovsky ,Kai-Thomas Brinkmann ,Vincenzo Bellini ,P Guèye ,Charles Hyde ,S A Wood ,M J Amaryan ,Ian L Pegg ,P Nadel-Turoński ,M Boër

doi:10.1140/epja/s10050-021-00581-x

Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab

A Afanasev, R Rondon + Show 72 more

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https://doi.org/10.1140/epja/s10050-021-00581-x

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Journal: The European Physical Journal A	Publication Date: Oct 1, 2021
Citations: 3

Affiliation: George Washington University, University of Virginia, University of Paris-Saclay, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie, Institut Polytechnique de Paris, French National Centre for Scientific Research, Institut National de Physique Nucléaire et de Physique des Particules, University of America, Catholic University of America, Old Dominion University, Atomic Energy and Alternative Energies Commission, Alikhanyan National Laboratory, James Madison University, University of Ljubljana, University of Colorado Boulder, Mississippi State University, University of Giessen, Florida International University, Thomas Jefferson National Accelerator Facility, Akdeniz University, University of Glasgow, Hampton University, University of New Hampshire, Ohio University, University of Monastir, Idaho State University, INFN Sezione di Catania, Michigan State University, Stony Brook University

#Deeply Virtual Compton Scattering #Beam Of Positrons + Show 8 more

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Abstract

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\(^2\) 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 \(Q^2-\)dependence of each contribution will be measured independently.

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