First CLAS12 Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries in the Extended Valence Region,Physical Review Letters

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First CLAS12 Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries in the Extended Valence Region
Physical Review Letters ( IF 8.1 ) Pub Date : 2023-05-25 , DOI: 10.1103/physrevlett.130.211902
G Christiaens _{1,

2} , M Defurne ₁ , D Sokhan _{1,

2} , P Achenbach ₃ , Z Akbar ₄ , M J Amaryan ₅ , H Atac ₆ , H Avakian ₃ , C Ayerbe Gayoso ₇ , L Baashen ₈ , N A Baltzell ₃ , L Barion ₉ , M Bashkanov ₁₀ , M Battaglieri ₁₁ , I Bedlinskiy ₁₂ , B Benkel ₁₃ , F Benmokhtar ₁₄ , A Bianconi _{15,

16} , A S Biselli ₁₇ , M Bondi ₁₈ , W A Booth ₁₀ , F Bossù ₁ , S Boiarinov ₃ , K-Th Brinkmann ₁₉ , W J Briscoe ₂₀ , S Bueltmann ₅ , D Bulumulla ₅ , V D Burkert ₃ , T Cao ₃ , D S Carman ₃ , J C Carvajal ₈ , A Celentano ₁₁ , P Chatagnon ₂₁ , V Chesnokov ₂₂ , T Chetry _{8,

23,

24} , G Ciullo _{9,

25} , G Clash ₁₀ , P L Cole _{3,

26,

27} , M Contalbrigo ₉ , G Costantini _{15,

16} , A D'Angelo _{18,

28} , N Dashyan ₂₉ , R De Vita ₁₁ , A Deur ₃ , S Diehl _{19,

30} , C Dilks ₃₁ , C Djalali _{24,

32} , R Dupre ₂₁ , H Egiyan ₃ , M Ehrhart ₂₁ , A El Alaoui ₁₃ , L El Fassi ₂₃ , L Elouadrhiri ₃ , S Fegan ₁₀ , A Filippi ₃₃ , K Gates ₂ , G Gavalian ₃ , Y Ghandilyan ₂₉ , G P Gilfoyle ₃₄ , F X Girod ₃ , D I Glazier ₂ , A A Golubenko ₂₂ , G Gosta ₁₅ , R W Gothe ₃₂ , Y Gotra ₃ , K A Griffioen ₇ , M Guidal ₂₁ , K Hafidi ₃₅ , H Hakobyan ₁₃ , M Hattawy _{5,

35} , F Hauenstein _{3,

5} , T B Hayward ₃₀ , D Heddle _{3,

36} , A Hobart ₂₁ , D E Holmberg ₇ , M Holtrop ₃₇ , Y Ilieva ₃₂ , D G Ireland ₂ , E L Isupov ₂₂ , H S Jo ₃₈ , D Keller ₄ , M Khachatryan ₅ , A Khanal ₈ , W Kim ₃₈ , A Kripko ₁₉ , V Kubarovsky ₃ , S E Kuhn ₅ , V Lagerquist ₅ , L Lanza ₁₈ , M L Kabir ₂₃ , M Leali _{15,

16} , S Lee ₃₉ , P Lenisa _{9,

25} , X Li ₃₉ , K Livingston ₂ , I J D MacGregor ₂ , D Marchand ₂₁ , V Mascagna _{15,

16,

40} , G Matousek ₃₁ , B McKinnon ₂ , C McLauchlin ₃₂ , Z E Meziani _{6,

35} , S Migliorati _{15,

16} , R G Milner ₃₉ , T Mineeva ₁₃ , M Mirazita ₄₁ , V Mokeev ₃ , E Molina ₁₃ , C Munoz Camacho ₂₁ , P Nadel-Turonski ₃ , P Naidoo ₂ , K Neupane ₃₂ , S Niccolai ₂₁ , M Nicol ₁₀ , G Niculescu ₄₂ , M Osipenko ₁₁ , M Ouillon ₂₁ , P Pandey ₅ , M Paolone _{6,

43} , L L Pappalardo _{9,

25} , R Paremuzyan _{3,

37} , E Pasyuk ₃ , S J Paul ₄₄ , W Phelps _{20,

36} , N Pilleux ₂₁ , M Pokhrel ₅ , J Poudel ₅ , J W Price ₄₅ , Y Prok ₅ , A Radic ₁₃ , N Ramasubramanian ₁ , B A Raue ₈ , Trevor Reed ₈ , J Richards ₃₀ , M Ripani ₁₁ , J Ritman _{46,

47} , P Rossi _{3,

41} , F Sabatié ₁ , C Salgado ₄₈ , S Schadmand _{46,

47} , A Schmidt _{20,

39} , M B C Scott ₃₅ , Y G Sharabian ₃ , E V Shirokov ₂₂ , U Shrestha _{24,

30} , P Simmerling ₃₀ , N Sparveris ₆ , M Spreafico ₁₁ , S Stepanyan ₃ , I I Strakovsky ₂₀ , S Strauch ₃₂ , J A Tan ₃₈ , N Trotta ₃₀ , M Turisini ₄₁ , R Tyson ₂ , M Ungaro ₃ , S Vallarino ₉ , L Venturelli _{15,

16} , H Voskanyan ₂₉ , E Voutier ₂₁ , D P Watts ₁₀ , X Wei ₃ , R Williams ₁₀ , R Wishart ₂ , M H Wood ₄₉ , N Zachariou ₁₀ , J Zhang ₄ , Z W Zhao _{5,

31} , V Ziegler ₃ , M Zurek ₃₅ ,

Affiliation

IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
University of Glasgow, Glasgow G12 8QQ, United Kingdom.
Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
University of Virginia, Charlottesville, Virginia 22901, USA.
Old Dominion University, Norfolk, Virginia 23529, USA.
Temple University, Philadelphia, Pennsylvania 19122, USA.
College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
Florida International University, Miami, Florida 33199, USA.
INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
University of York, York YO10 5DD, United Kingdom.
INFN, Sezione di Genova, 16146 Genova, Italy.
National Research Centre Kurchatov Institute-ITEP, Moscow, 117259, Russia.
Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA.
Universit'a degli Studi di Brescia, 25123 Brescia, Italy.
INFN, Sezione di Pavia, 27100 Pavia, Italy.
Fairfield University, Fairfield, Connecticut 06824, USA.
INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany.
The George Washington University, Washington, D.C. 20052, USA.
Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France.
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
Ohio University, Athens, Ohio 45701, USA.
Universita' di Ferrara, 44121 Ferrara, Italy.
Lamar University, 4400 MLK Boulevard, P.O. Box 10046, Beaumont, Texas 77710, USA.
Catholic University of America, Washington, D.C. 20064, USA.
Universita' di Roma Tor Vergata, 00133 Rome, Italy.
Yerevan Physics Institute, 375036 Yerevan, Armenia.
University of Connecticut, Storrs, Connecticut 06269, USA.
Duke University, Durham, North Carolina 27708-0305, USA.
University of South Carolina, Columbia, South Carolina 29208, USA.
INFN, Sezione di Torino, 10125 Torino, Italy.
University of Richmond, Richmond, Virginia 23173, USA.
Argonne National Laboratory, Argonne, Illinois 60439, USA.
Christopher Newport University, Newport News, Virginia 23606, USA.
University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
Kyungpook National University, Daegu 41566, Republic of Korea.
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
Università degli Studi dell'Insubria, 22100 Como, Italy.
INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
James Madison University, Harrisonburg, Virginia 22807, USA.
New Mexico State University, P.O. Box 30001, Las Cruces, New Mexico 88003, USA.
University of California Riverside, 900 University Avenue, Riverside, California 92521, USA.
California State University, Dominguez Hills, Carson, California 90747, USA.
GSI Helmholtzzentrum fur Schwerionenforschung GmbH, D 64291 Darmstadt, Germany.
Institute fur Kernphysik (Juelich), 52428 Juelich, Germany.
Norfolk State University, Norfolk, Virginia 23504, USA.
Canisius College, Buffalo, New York 14208, USA.

Deeply virtual Compton scattering (DVCS) allows one to probe generalized parton distributions 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 unpolarized protons. The results greatly extend the

Q^{2}

and Bjorken-

x

phase space beyond the existing data in the valence region and provide 1600 new data points measured with unprecedented statistical uncertainty, setting new, tight constraints for future phenomenological studies.

中文翻译：

扩展价区深度虚拟康普顿散射光束自旋不对称性的首次 CLAS12 测量

深度虚拟康普顿散射 (DVCS) 允许人们探测描述核子 3D 结构的广义部分子分布。我们报告了使用 CLAS12 光谱仪对 DVCS 光束自旋不对称性的首次测量，该光谱仪具有来自非极化质子的 10.2 和 10.6 GeV 电子束散射。结果大大扩展了