First Measurement of Hard Exclusive p- ? plus plus Electroproduction Beam-Spin Asymmetries off the Proton

被引：8

作者：

Diehl, S. ^{[6
,34
]}

Trotta, N. ^{[6
]}

Joo, K. ^{[6
]}

Achenbach, P. ^{[39
]}

Akbar, Z. ^{[12
,46
]}

Armstrong, W. R. ^{[1
]}

Atac, H. ^{[38
]}

Avakian, H. ^{[39
]}

Baashen, L. ^{[11
]}

Baltzell, N. A. ^{[39
]}

Barion, L. ^{[15
]}

Bashkanov, M. ^{[45
]}

Battaglieri, M. ^{[17
]}

Bedlinskiy, I. ^{[28
]}

Benmokhtar, F. ^{[8
]}

Bianconi, A. ^{[20
,42
]}

Biselli, A. S. ^{[9
]}

Bossu, F. ^{[4
]}

Brinkmann, K. -T. ^{[34
]}

Briscoe, W. J. ^{[13
]}

Bulumulla, D. ^{[33
]}

Burkert, V. ^{[39
]}

Capobianco, R. ^{[6
]}

Carman, D. S. ^{[39
]}

Carvajal, J. C. ^{[11
]}

Celentano, A. ^{[17
]}

Charles, G. ^{[21
,33
]}

Chatagnon, P. ^{[21
,39
]}

Chesnokov, V. ^{[36
]}

Ciullo, G. ^{[10
,15
]}

Cole, P. L. ^{[25
]}

Contalbrigo, M. ^{[15
]}

Costantini, G. ^{[20
,42
]}

Crede, V. ^{[12
]}

D'Angelo, A. ^{[18
,35
]}

Dashyan, N. ^{[48
]}

De Vita, R. ^{[17
]}

Deur, A. ^{[39
]}

Djalali, C. ^{[32
,37
]}

Dupre, R. ^{[21
]}

Ehrhart, M. ^{[21
]}

El Alaoui, A. ^{[40
]}

El Fassi, L. ^{[27
]}

Elouadrhiri, L. ^{[39
]}

Fegan, S. ^{[45
]}

Filippi, A. ^{[19
]}

Gavalian, G. ^{[39
]}

Glazier, D. I. ^{[44
]}

Golubenko, A. A. ^{[36
]}

Gosta, G. ^{[20
,42
]}

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Calif State Univ, Dominguez Hills, Carson, CA 90747 USA

[3] Canisius Coll, Buffalo, NY 14208 USA

[4] Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France

[5] Christopher Newport Univ, Newport News, VA 23606 USA

[6] Univ Connecticut, Storrs, CT 06269 USA

[7] Duke Univ, Durham, NC 27708 USA

[8] Duquesne Univ, 600 Forbes Ave, Pittsburgh, PA 15282 USA

[9] Fairfield Univ, Fairfield, CT 06824 USA

[10] Univ Ferrara, I-44121 Ferrara, Italy

[11] Florida Int Univ, Miami, FL 33199 USA

[12] Florida State Univ, Tallahassee, FL 32306 USA

[13] George Washington Univ, Washington, DC 20052 USA

[14] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[15] INFN, Sez Ferrara, I-44100 Ferrara, Italy

[16] INFN, Lab Nazl Frascati, I-00044 Frascati, Italy

[17] INFN, Sez Genova, I-16146 Genoa, Italy

[18] INFN, Sez Roma Tor Vergata, I-00133 Rome, Italy

[19] INFN, Sez Torino, I-10125 Turin, Italy

[20] INFN, Sez Pavia, I-27100 Pavia, Italy

[21] Univ Paris Saclay, CNRS, IN2P3, IJCLab, F-91405 Orsay, France

[22] Inst Kernphys Juelich, Julich, Germany

[23] James Madison Univ, Harrisonburg, VA 22807 USA

[24] Kyungpook Natl Univ, Daegu 41566, South Korea

[25] Lamar Univ, 4400 MLK Blvd,POB 10046, Beaumont, TX 77710 USA

[26] MIT, Cambridge, MA 02139 USA

[27] Mississippi State Univ, Mississippi State, MS 39762 USA

[28] Natl Res Ctr Kurchatov Inst TEP, Moscow 117259, Russia

[29] Univ New Hampshire, Durham, NH 03824 USA

[30] New Mexico State Univ, POB 30001, Las Cruces, NM 88003 USA

[31] Norfolk State Univ, Norfolk, VA 23504 USA

[32] Ohio Univ, Athens, OH 45701 USA

[33] Old Dominion Univ, Norfolk, VA 23529 USA

[34] Univ Giessen, Phys Inst 2, D-35392 Giessen, Germany

[35] Univ Roma Tor Vergata, I-00133 Rome, Italy

[36] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119234, Russia

[37] Univ South Carolina, Columbia, SC 29208 USA

[38] Temple Univ, Philadelphia, PA 19122 USA

[39] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[40] Univ Tecn Federico Santa Maria, Casilla 110-V, Valparaiso, Chile

[41] Univ Insubria, I-22100 Como, Italy

[42] Univ Brescia, I-25123 Brescia, Italy

[43] Univ Calif Riverside, 900 Univ Ave, Riverside, CA 92521 USA

[44] Univ Glasgow, Glasgow G12 8QQ, Scotland

[45] Univ York, York YO10 5DD, England

[46] Univ Virginia, Charlottesville, VA 22901 USA

[47] Coll William & Mary, Williamsburg, VA 23187 USA

[48] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 02期

基金：

美国国家科学基金会; 英国科学技术设施理事会; 新加坡国家研究基金会;

关键词：

PION PRODUCTION; PHOTOPRODUCTION; MESONS; DELTA;

D O I：

10.1103/PhysRevLett.131.021901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The polarized cross-section ratio rrLT �/rr0 from hard exclusive ir-A++ electroproduction off an unpolarized hydrogen target has been extracted based on beam-spin asymmetry measurements using a 10.2 GeV/10.6 GeV incident electron beam and the CLAS12 spectrometer at Jefferson Lab. The study, which provides the first observation of this channel in the deep-inelastic regime, focuses on very forward-pion kinematics in the valence regime, and photon virtualities ranging from 1.5 GeV2 up to 7 GeV2. The reaction provides a novel access to the d-quark content of the nucleon and to p & RARR; A++ transition generalized parton distributions. A comparison to existing results for hard exclusive ir+n and ir0p electroproduction is provided, which shows a clear impact of the excitation mechanism, encoded in transition generalized parton distributions, on the asymmetry.

引用

页数：7

共 34 条

[1] PHOTO- ELECTRO- AND WEAK SINGLE-PION PRODUCTION IN (3,3) RESONANCE REGION
ADLER, SL
[J]. ANNALS OF PHYSICS, 1968, 50 (02) : 189 - &
[2] ADLER SL, 1975, PHYS REV D, V12, P2644, DOI 10.1103/PhysRevD.12.2644
[3] QED radiative corrections in processes of exclusive pion electroproduction
Afanasev, A
Akushevich, I
Burkert, V
Joo, K
[J]. PHYSICAL REVIEW D, 2002, 66 (07):
[4] GEANT4-a simulation toolkit
Agostinelli, S
Allison, J
Amako, K
Apostolakis, J
Araujo, H
Arce, P
Asai, M
Axen, D
Banerjee, S
Barrand, G
Behner, F
Bellagamba, L
Boudreau, J
Broglia, L
Brunengo, A
Burkhardt, H
Chauvie, S
Chuma, J
Chytracek, R
Cooperman, G
Cosmo, G
Degtyarenko, P
Dell'Acqua, A
Depaola, G
Dietrich, D
Enami, R
Feliciello, A
Ferguson, C
Fesefeldt, H
Folger, G
Foppiano, F
Forti, A
Garelli, S
Giani, S
Giannitrapani, R
Gibin, D
Cadenas, JJG
González, I
Abril, GG
Greeniaus, G
Greiner, W
Grichine, V
Grossheim, A
Guatelli, S
Gumplinger, P
Hamatsu, R
Hashimoto, K
Hasui, H
Heikkinen, A
Howard, A
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 506 (03) : 250 - 303
[5] Some tests for the helicity structure of the Pomeron in ep collisions
Arens, T
Nachtmann, O
Diehl, M
Landshoff, PV
[J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1997, 74 (04): : 651 - 669
[6] Unraveling hadron structure with generalized parton distributions
Belitsky, AV
Radyushkin, AV
[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2005, 418 (1-6): : 1 - 387
[7] DIFFRACTIVE LEPTOPRODUCTION OF VECTOR-MESONS IN QCD
BRODSKY, SJ
FRANKFURT, L
GUNION, JF
MUELLER, AH
STRIKMAN, M
[J]. PHYSICAL REVIEW D, 1994, 50 (05): : 3134 - 3144
[8] The CLAS12 Spectrometer at Jefferson Laboratory
Burkert, V. D.
Elouadrhiri, L.
Adhikari, K. P.
Adhikari, S.
Amaryan, M. J.
Anderson, D.
Angelini, G.
Antonioli, M.
Atac, H.
Aune, S.
Avakian, H.
Gayoso, C. Ayerbe
Baltzell, N.
Barion, L.
Battaglieri, M.
Baturin, V
Bedlinskiy, I
Benmokhtar, F.
Bianconi, A.
Biselli, A. S.
Bonneau, P.
Bossu, F.
Boyarinov, S.
Briscoe, W. J.
Brooks, W. K.
Bruhwel, K.
Carman, D. S.
Celentano, A.
Charles, G.
Chatagnon, P.
Chetry, T.
Christiaens, G.
Christo, S.
Ciullo, G.
Clary, B. A.
Cole, P. L.
Contalbrigo, M.
Cook, M.
Crede, V
Cruz-Torres, R.
Cuevas, C.
D'Angelo, A.
Dashyan, N.
Defurne, M.
Deur, A.
De Vita, R.
Diehl, S.
Djalali, C.
Dodge, G.
Dupre, R.
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2020, 959 (959)
[9] clas, CLAS PHYS DAT
[10] Polarized antimatter in the proton from a global QCD analysis
Cocuzza, C.
Melnitchouk, W.
Metz, A.
Sato, N.
[J]. PHYSICAL REVIEW D, 2022, 106 (03)

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