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Deeply virtual Compton scattering cross section at high Bjorken x_B

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arxiv 2201.03714 v1 pith:6LJXGAQ5 submitted 2022-01-11 hep-ph hep-exnucl-ex

Deeply virtual Compton scattering cross section at high Bjorken x_B

F. Georges , M.N.H. Rashad , A. Stefanko , M. Dlamini , B. Karki , S.F. Ali , P-J. Lin , H-S Ko
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N. Israel D. Adikaram Z. Ahmed H. Albataineh B. Aljawrneh K. Allada S. Allison S. Alsalmi D. Androic K. Aniol J. Annand H. Atac T. Averett C. Ayerbe Gayoso X. Bai J. Bane S. Barcus K. Bartlett V. Bellini R. Beminiwattha J. Bericic D. Biswas E. Brash D. Bulumulla J. Campbell A. Camsonne M. Carmignotto J. Castellano C. Chen J-P. Chen T. Chetry M.E. Christy E. Cisbani B. Clary E. Cohen N. Compton J.C. Cornejo S. Covrig Dusa B. Crowe S. Danagoulian T. Danley F. De Persio W. Deconinck M. Defurne C. Desnault D. Di M. Duer B. Duran R. Ent C. Fanelli G. Franklin E. Fuchey C. Gal D. Gaskell T. Gautam O. Glamazdin K. Gnanvo V.M. Gray C. Gu T. Hague G. Hamad D. Hamilton K. Hamilton O. Hansen F. Hauenstein W. Henry D.W. Higinbotham T. Holmstrom T. Horn Y. Huang G.M. Huber C. Hyde H. Ibrahim C-M. Jen K. Jin M. Jones A. Kabir C. Keppel V. Khachatryan P.M. King S. Li W.B. Li J. Liu H. Liu A. Liyanage J. Magee S. Malace J. Mammei P. Markowitz E. McClellan M. Mazouz F. Meddi D. Meekins K. Mesik R. Michaels A. Mkrtchyan R. Montgomery C. Mu\~noz Camacho L.S. Myers P. Nadel-Turonski S.J. Nazeer V. Nelyubin D. Nguyen N. Nuruzzaman M. Nycz O.F. Obretch L. Ou C. Palatchi B. Pandey S. Park K. Park C. Peng R. Pomatsalyuk E. Pooser A.J.R. Puckett V. Punjabi B. Quinn S. Rahman P.E. Reimer J. Roche I. Sapkota A. Sarty B. Sawatzky N.H. Saylor B. Schmookler M.H. Shabestari A. Shahinyan S. Sirca G.R. Smith S. Sooriyaarachchilage N. Sparveris R. Spies T. Su A. Subedi V. Sulkosky A. Sun L. Thorne Y. Tian N. Ton F. Tortorici R. Trotta G.M. Urciuoli E. Voutier B. Waidyawansa Y. Wang B. Wojtsekhowski S. Wood X. Yan L. Ye Z. Ye C. Yero J. Zhang Y. Zhao P. Zhu
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classification hep-ph hep-exnucl-ex
keywords comptoncrossdvcshighnucleonsectionbjorkencffs
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report high-precision measurements of the Deeply Virtual Compton Scattering (DVCS) cross section at high values of the Bjorken variable $x_B$. DVCS is sensitive to the Generalized Parton Distributions of the nucleon, which provide a three-dimensional description of its internal constituents. Using the exact analytic expression of the DVCS cross section for all possible polarization states of the initial and final electron and nucleon, and final state photon, we present the first experimental extraction of all four helicity-conserving Compton Form Factors (CFFs) of the nucleon as a function of $x_B$, while systematically including helicity flip amplitudes. In particular, the high accuracy of the present data demonstrates sensitivity to some very poorly known CFFs.

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