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First CLAS12 measurement of DVCS beam-spin asymmetries in the extended valence region

Authors :
CLAS Collaboration
Christiaens, G.
Defurne, M.
Sokhan, D.
Achenbach, P.
Akbar, Z.
Amaryan, M. J.
Atac, H.
Avakian, H.
Gayoso, C. Ayerbe
Baashen, L.
Baltzell, N. A.
Barion, L.
Bashkanov, M.
Battaglieri, M.
Bedlinskiy, I.
Benkel, B.
Benmokhtar, F.
Bianconi, A.
Biselli, A. S.
Bondi, M.
Booth, W. A.
Bossù, F.
Boiarinov, S.
Brinkmann, K. -Th.
Briscoe, W. J.
Bueltmann, S.
Bulumulla, D.
Burkert, V. D.
Cao, T.
Carman, D. S.
Carvajal, J. C.
Celentano, A.
Chatagnon, P.
Chesnokov, V.
Chetry, T.
Ciullo, G.
Clash, G.
Cole, P. L.
Contalbrigo, M.
Costantini, G.
D'Angelo, A.
Dashyan, N.
De Vita, R.
Deur, A.
Diehl, S.
Dilks, C.
Djalali, C.
Dupre, R.
Egiyan, H.
Ehrhart, M.
Alaoui, A. El
Fassi, L. El
Elouadrhiri, L.
Fegan, S.
Filippi, A.
Gates, K.
Gavalian, G.
Ghandilyan, Y.
Gilfoyle, G. P.
Girod, F. X.
Glazier, D. I.
Golubenko, A. A.
Gosta, G.
Gothe, R. W.
Gotra, Y.
Griffioen, K. A.
Guidal, M.
Hafidi, K.
Hakobyan, H.
Hattawy, M.
Hauenstein, F.
Hayward, T. B.
Heddle, D.
Hobart, A.
Holmberg, D. E.
Holtrop, M.
Ilieva, Y.
Ireland, D. G.
Isupov, E. L.
Jo, H. S.
Kabir, M. L.
Keller, D.
Khachatryan, M.
Khanal, A.
Kim, W.
Kripko, A.
Kubarovsky, V.
Kuhn, S. E.
Lagerquist, V.
Lanza, L.
Leali, M.
Lee, S.
Lenisa, P.
Li, X.
Livingston, K.
MacGregor, I . J . D.
Marchand, D.
Mascagna, V.
Matousek, G.
McKinnon, B.
McLauchlin, C.
Meziani, Z. E.
Migliorati, S.
Milner, R. G.
Mineeva, T.
Mirazita, M.
Mokeev, V.
Molina, E.
Camacho, C. Munoz
Nadel-Turonski, P.
Naidoo, P.
Neupane, K.
Niccolai, S.
Nicol, M.
Niculescu, G.
Osipenko, M.
Ouillon, M.
Pandey, P.
Paolone, M.
Pappalardo, L. L.
Paremuzyan, R.
Pasyuk, E.
Paul, S. J.
Phelps, W.
Pilleux, N.
Pokhrel, M.
Poudel, J.
Price, J. W.
Prok, Y.
Radic, A.
Ramasubramanian, N.
Raue, B. A.
Reed, T.
Richards, J.
Ripani, M.
Ritman, J.
Rossi, P.
Sabatié, F.
Salgado, C.
Schadmand, S.
Schmidt, A.
Scott, M. B. C.
Sharabian, Y. G.
Shirokov, E. V.
Shrestha, U.
Simmerling, P.
Sparveris, N.
Spreafico, M.
Stepanyan, S.
Strakovsky, I. I.
Strauch, S.
Tan, J. A.
Trotta, N.
Turisini, M.
Tyson, R.
Ungaro, M.
Vallarino, S.
Venturelli, L.
Voskanyan, H.
Voutier, E.
Watts, D. P.
Wei, X.
Williams, R.
Wishart, R.
Wood, M. H.
Zachariou, N.
Zhang, J.
Zhao, Z. W.
Ziegler, V.
Zurek, M.
Publication Year :
2022

Abstract

Deeply virtual Compton scattering (DVCS) allows one to probe Generalized Parton Distributions (GPDs) describing the 3D structure of the nucleon. We report the first measurement of the DVCS beam-spin asymmetry using the CLAS12 spectrometer with a 10.2 and 10.6 GeV electron beam scattering from unpolarised protons. The results greatly extend the $Q^2$ and Bjorken-$x$ phase space beyond the existing data in the valence region and provide over 2000 new data points measured with unprecedented statistical uncertainty, setting new, tight constraints for future phenomenological studies.<br />Comment: Revised Figure 4 and discussion around the number of effective ANNs after Bayesian reweighting

Subjects

Subjects :
High Energy Physics - Experiment

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2211.11274
Document Type :
Working Paper

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