CLAS12对深度虚拟$\pi^0$产生的束自旋不对称性测量
摘要：深度虚拟排他性$pi^0$产生的光子自旋非对称性的新实验测量在广泛的动力学区域进行，其中光子的虚拟度$Q^2$高达8 GeV$^2$，Bjorken标度变量$x\_B$位于价电子区域。数据由Jefferson Lab的CEBAF大接受光谱仪（CLAS12）收集，使用长纵向极化的10.6 GeV 电子散射在非极化液氢靶上。显著的非对称性值表明，横向虚拟光子振幅对极化结构函数的贡献很大。利用广义齐次分布（GPDs）解释这些测量结果显示它们对手征奇异GPD $ar E\_T$具有敏感性，该GPD包含了非极化和极化核子中夸克横向自旋密度的信息，并提供了进入质子横向反常磁矩的途径。此外，将数据与基于Regge形式体系扩展到高光子虚拟度的理论模型进行了比较。
作者：A. Kim (1), S. Diehl (2 and 1), K. Joo (1), V.Kubarovsky (3), P.Achenbach (3), Z.Akbar (4 and 5), J. S. Alvarado (6), Whitney R. Armstrong (7), H.Atac (8), H.Avakian (3), C. Ayerbe Gayoso (9), L. Barion (10), M.Battaglieri (11), I.Bedlinskiy (12), B.Benkel (13), A.Bianconi (14 and 15), A.S.Biselli (16), M.Bondi (11), F.Boss`u (17), S.Boiarinov (3), K.T.Brinkmann (2), W.J.Briscoe (18), W.K.Brooks (13), S.Bueltmann (19), V.D.Burkert (3), R.Capobianco (1), D.S.Carman (3), J.C.Carvajal (20), A.Celentano (11), G.Charles (6 and 19), P.Chatagnon (3 and 6), V.Chesnokov (21), T. Chetry (20 and 22 and 23), G.Ciullo (10 and 24), B.Clary (25 and 1), G.Clash (26), P.L.Cole (27), M.Contalbrigo (10), G.Costantini (14 and 15), V.Crede (5), A.D'Angelo (28 and 29), N.Dashyan (30), R.DeVita (11), M. Defurne (17), A.Deur (3), C.Dilks (31), C.Djalali (23 and 32), R.Dupre (6), H.Egiyan (3), M.Ehrhart (33 and 6), A.ElAlaoui (13), L.ElFassi (22), S.Fegan (26), A.Filippi (34), C. Fogler (19), G.Gavalian (3), G.P.Gilfoyle (35), G.Gosta (15), F.X.Girod (3), D.I.Glazier (36), A.A. Golubenko (21), R.W.Gothe (32), L.Guo (20), K.Hafidi (7), H.Hakobyan (13), M.Hattawy (19 and 7), F.Hauenstein (3 and 19), T.B.Hayward (1), D.Heddle (37 and 3), A.Hobart (6), M.Holtrop (38), Yu-Chun Hung (19), Y.Ilieva (32), D.G.Ireland (36), E.Isupov (21), H.S.Jo (39), R.Johnston (40), S. Joosten (7 and 8), M.Khachatryan (19), A.Khanal (20), W.Kim (39), V.Klimenko (1), A.Kripko (2), S.E.Kuhn (19), L. Lanza (28 and 29), M.Leali (14 and 15), M.L.Kabir (22), S.Lee (7), P.Lenisa (10 and 24), X.Li (40), I .J .D.MacGregor (36), D.Marchand (6), V.Mascagna (14 and 41 and 15), B.McKinnon (36), D.Matamoros (6), S.Migliorati (14 and 15), T.Mineeva (13), M.Mirazita (42), V.Mokeev (3), P.Moran (40), C.MunozCamacho (6), P.Naidoo (36), K.Neupane (32), D.Nguyen (3), S.Niccolai (6), G.Niculescu (43), M.Osipenko (11), M.Ouillon (6), P.Pandey (19), M.Paolone (44 and 8), L.L.Pappalardo (10 and 24), R.Paremuzyan (3 and 38), E.Pasyuk (3), S.J.Paul (45), W.Phelps (37 and 18), N.Pilleux (6), M.Pokhrel (19), J.Poudel (46 and 19), J.W.Price (47), Y.Prok (19), A. Radic (13), N.Ramasubramanian (17), Trevor Reed (20), J.Richards (1), M.Ripani (11), J.Ritman (48 and 49), P.Rossi (3 and 42), F.Sabati''e (17), C.Salgado (50), S.Schadmand (49), A.Schmidt (18 and 40), Y.G.Sharabian (3), E.V.Shirokov (21), U.Shrestha (1 and 23), D.Sokhan (17 and 36), N.Sparveris (8), M.Spreafico (11), S.Stepanyan (3), I.I.Strakovsky (18), S.Strauch (32), J.Tan (39), N.Trotta (1), R.Tyson (36), M.Ungaro (3), S.Vallarino (10), L.Venturelli (14 and 15), H.Voskanyan (30), E.Voutier (6), D.P.Watts (26), X.Wei (3), R.Wishart (36), M.H.Wood (51), M.Yurov (22), N.Zachariou (26), J.Zhang (4), V.Ziegler (3), M.Zurek (7) (for the CLAS collaboration, (1) University of Connecticut, Storrs, Connecticut, (10) INFN, Sezione di Ferrara, Ferrara, Italy, (11) INFN, Sezione di Genova, Genova, Italy, (12) National Research Centre Kurchatov Institute - ITEP, Moscow, Russia, (13) Universidad T'', (14) Universit`, (15) INFN, Sezione di Pavia, Pavia, Italy, (16) Fairfield University, Fairfield CT, (17) IRFU, CEA, Universit'', (18) The George Washington University, Washington, DC, (19) Old Dominion University, Norfolk, Virginia, (2) II Physikalisches Institut der Universitaet Giessen, Giessen, Germany, (20) Florida International University, Miami, Florida, (21) Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia, (22) Mississippi State University, Mississippi State, MS, (23) Ohio University, Athens, Ohio, (24) Universita' di Ferrara, Ferrara, Italy, (25) Lawrence Livermore National Laboratory, Livermore, CA, (26) University of York, York, United Kingdom, (27) Lamar University, Beaumont, Texas, (28) INFN, Sezione di Roma Tor Vergata, Rome, Italy, (29) Universita' di Roma Tor Vergata, Rome Italy, (3) Thomas Jefferson National Accelerator Facility, Newport News, Virginia, (30) Yerevan Physics Institute, Yerevan, Armenia, (31) Duke University, Durham, North Carolina, (32) University of South Carolina, Columbia, South Carolina, (33) Argonne National Laboratory, Argonne, Illinois, (34) INFN, Sezione di Torino, Torino, Italy, (35) University of Richmond, Richmond, Virginia, (36) University of Glasgow, Glasgow, United Kingdom, (37) Christopher Newport University, Newport News, Virginia, (38) University of New Hampshire, Durham, New Hampshire, (39) Kyungpook National University, Daegu, Republic of Korea, (4) University of Virginia, Charlottesville, Virginia, (40) Massachusetts Institute of Technology, Cambridge, Massachusetts, (41) Universit`, (42) INFN, Laboratori Nazionali di Frascati, Frascati, Italy, (43) James Madison University, Harrisonburg, Virginia, (44) New Mexico State University, PO Box, Las Cruces, NM 88003, USA, (45) University of California Riverside, Riverside, CA, USA, (46) Thomas Jefferson National Accelerator Facility, Newport News, Virginia, (47) California State University, Dominguez Hills, Carson, CA, (48) Ruhr-Universit, (49) GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt, Germany, (5) Florida State University, Tallahassee, Florida, (50) Norfolk State University, Norfolk, Virginia, (51) Canisius College, Buffalo, NY, (6) Universit', (7) Argonne National Laboratory, Argonne, Illinois, (8) Temple University, Philadelphia, PA, (9) College of William and Mary, Williamsburg, Virginia)
论文ID：2307.07874
分类：Nuclear Experiment
分类简称：nucl-ex
提交时间：2023-07-18