Extraction of beam-spin asymmetries from the hard exclusive $π^{+}$ channel off protons in a wide range of kinematics
Creators: name: Diehl, S.
name: Joo, K.
name: Kim, A.
name: Avakian, H.
name: Kroll, P.
name: Park, K.
name: Riser, D.
name: Semenov-Tian-Shansky, K.
name: Tezgin, K.
name: Adhikari, K. P.
name: Adhikari, S.
name: Amaryan, M. J.
name: Angelini, G.
name: Asryan, G.
name: Atac, H.
name: Barion, L.
name: Battaglieri, M.
name: Bedlinskiy, I.
name: Benmokhtar, F.
name: Bianconi, A.
name: Biselli, A. S.
name: Boss`u, F.
name: Boiarinov, S.
name: Briscoe, W. J.
name: Brooks, W. K.
name: Bulumulla, D.
name: Burkert, V. D.
name: Carman, D. S.
name: Carvajal, J. C.
name: Celentano, A.
name: Chatagnon, P.
name: Chetry, T.
name: Ciullo, G.
name: Clark, L.
name: Cole, P. L.
name: Contalbrigo, M.
name: Crede, V.
name: D'Angelo, A.
name: Dashyan, N.
name: De Vita, R.
name: Defurne, M.
name: Deur, A.
name: Dilks, C.
name: Djalali, C.
name: Dupre, R.
name: Egiyan, H.
name: Ehrhart, M.
name: Alaoui, A. El
name: Fassi, L. El
name: Eugenio, P.
name: Filippi, A.
name: Forest, T. A.
name: Ghandilyan, Y.
name: Gilfoyle, G. P.
name: Giovanetti, K. L.
name: Girod, F. X.
name: Glazier, D. I.
name: Golovatch, E.
name: Gothe, R. W.
name: Griffioen, K. A.
name: Guidal, M.
name: Guo, L.
name: Hakobyan, H.
name: Harrison, N.
name: Hattawy, M.
name: Hayward, T. B.
name: Heddle, D.
name: Hicks, K.
name: Holtrop, M.
name: Ilieva, Y.
name: Ireland, D. G.
name: Ishkhanov, B. S.
name: Isupov, E. L.
name: Jenkins, D.
name: Jo, H. S.
name: Joosten, S.
name: Keller, D.
name: Khachatryan, M.
name: Khanal, A.
name: Khandaker, M.
name: Kim, C. W.
name: Kim, W.
name: Kubarovsky, V.
name: Kuhn, S. E.
name: Lanza, L.
name: Leali, M.
name: Lenisa, P.
name: Livingston, K.
name: MacGregor, I. J. D.
name: Marchand, D.
name: Markov, N.
name: Marsicano, L.
name: Mascagna, V.
name: McKinnon, B.
name: Meziani, Z. E.
name: Mineeva, T.
name: Mirazita, M.
name: Mokeev, V.
name: Camacho, C. Munoz
name: Nadel-Turonski, P.
name: Niculescu, G.
name: Osipenko, M.
name: Paolone, M.
name: Pappalardo, L. L.
name: Pasyuk, E.
name: Phelps, W.
name: Pogorelko, O.
name: Price, J. W.
name: Prok, Y.
name: Raue, B. A.
name: Ripani, M.
name: Rizzo, A.
name: Rossi, P.
name: Rowley, J.
name: Sabatie, F.
name: Salgado, C.
name: Schmidt, A.
name: Schumacher, R. A.
name: Sharabian, Y. G.
name: Shrestha, U.
name: Soto, O.
name: Sparveris, N.
name: Stepanyan, S.
name: Stoler, P.
name: Strakovsky, I. I.
name: Strauch, S.
name: Tan, J. A.
name: Tyler, N.
name: Ungaro, M.
name: Venturelli, L.
name: Voskanyan, H.
name: Voutier, E.
name: Watts, D. P.
name: Wei, X.
name: Wood, M. H.
name: Zachariou, N.
name: Zhang, J.
name: Zhao, Z. W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We have measured beam-spin asymmetries to extract the $\sinϕ$ moment $A_{LU}^{\sinϕ}$ from the hard exclusive $\vec{e} p \to e^\prime n π^+$ reaction above the resonance region, for the first time with nearly full coverage from forward to backward angles in the center-of-mass. The $A_{LU}^{\sinϕ}$ moment has been measured up to 6.6 GeV$^{2}$ in $-t$, covering the kinematic regimes of Generalized Parton Distributions (GPD) and baryon-to-meson Transition Distribution Amplitudes (TDA) at the same time. The experimental results in very forward kinematics demonstrate the sensitivity to chiral-odd and chiral-even GPDs. In very backward kinematics where the TDA framework is applicable, we found $A_{LU}^{\sinϕ}$ to be negative, while a sign change was observed near 90$^\circ$ in the center-of-mass. The unique results presented in this paper will provide critical constraints to establish reaction mechanisms that can help to further develop the GPD and TDA frameworks.