Observation of Correlations between Spin and Transverse Momenta in Back-to-Back Dihadron Production at CLAS12

被引：9

作者：

Avakian, H. ^{[1
]}

Hayward, T. B. ^{[2
]}

Kotzinian, A. ^{[3
,4
]}

Armstrong, W. R. ^{[5
]}

Atac, H. ^{[6
]}

Gayoso, C. Ayerbe ^{[7
]}

Baashen, L. ^{[8
]}

Baltzell, N. A. ^{[1
]}

Barion, L. ^{[9
]}

Bashkanov, M. ^{[10
]}

Battaglieri, M. ^{[11
]}

Bedlinskiy, I. ^{[12
]}

Benkel, B. ^{[13
]}

Benmokhtar, F. ^{[14
]}

Bianconi, A. ^{[15
,16
]}

Biondo, L. ^{[11
,17
,18
]}

Biselli, A. S. ^{[19
]}

Bondi, M. ^{[20
]}

Boiarinov, S. ^{[1
]}

Bossu, F. ^{[21
]}

Brinkman, K. T. ^{[22
]}

Briscoe, W. J. ^{[23
]}

Brooks, W. K. ^{[13
]}

Bueltmann, S. ^{[24
]}

Bulumulla, D. ^{[24
]}

Burkert, V. D. ^{[1
]}

Capobianco, R. ^{[2
]}

Carman, D. S. ^{[1
]}

Carvajal, J. C. ^{[8
]}

Celentano, A. ^{[11
]}

Chatagnon, P. ^{[25
]}

Chesnokov, V. ^{[26
]}

Chetry, T. ^{[8
,27
,28
]}

Ciullo, G. ^{[9
,29
]}

Cole, P. L. ^{[30
]}

Contalbrigo, M. ^{[9
]}

Costantini, G. ^{[15
,16
]}

D'Angelo, A. ^{[20
,31
]}

Dashyan, N. ^{[3
]}

De Vita, R. ^{[11
]}

Defurne, M. ^{[21
]}

Deur, A. ^{[1
]}

Diehl, S. ^{[2
,22
]}

Dilks, C. ^{[32
]}

Djalali, C. ^{[28
]}

Dupre, R. ^{[25
]}

Egiyan, H. ^{[1
]}

El Alaoui, A. ^{[13
]}

El Fassi, L. ^{[27
]}

Elouadrhiri, L. ^{[1
]}

机构：

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

[2] Univ Connecticut, Storrs, CT 06269 USA

[3] Yerevan Phys Inst, Yerevan 375036, Armenia

[4] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

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

[6] Temple Univ, Philadelphia, PA 19122 USA

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

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

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

[10] Univ York, York YO10 5DD, N Yorkshire, England

[11] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[12] Natl Res Ctr Kurchatov Inst ITEP, Moscow 117259, Russia

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

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

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

[16] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[17] Ist Nazl Fis Nucl, Sez Catania, I-95123 Catania, Italy

[18] Univ Messina, I-98166 Messina, Italy

[19] Fairfield Univ, Fairfield, CT 06824 USA

[20] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

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

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

[23] George Washington Univ, Washington, DC USA

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

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

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

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

[28] Ohio Univ, Athens, OH 45701 USA

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

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

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

[32] Duke Univ, Durham, NC 27708 USA

[33] Idaho State Univ, Pocatello, ID 83209 USA

[34] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

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

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

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

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

[39] MIT, Cambridge, MA 02139 USA

[40] Univ Virginia, Charlottesville, VA 22901 USA

[41] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

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

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

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

[45] California State Univ, Dominguez Hills, Carson, CA 90747 USA

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

[47] Inst Kernphys Juelich, D-52428 Julich, Germany

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

[49] Canisius Coll, Buffalo, NY 14208 USA

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 02期

基金：

英国科学技术设施理事会; 新加坡国家研究基金会; 美国国家科学基金会;

关键词：

MONTE-CARLO GENERATOR; ASYMMETRIES;

D O I：

10.1103/PhysRevLett.130.022501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first measurements of deep inelastic scattering spin-dependent azimuthal asymmetries in back-to-back dihadron electroproduction in the deep inelastic scattering process. In this reaction, two hadrons are produced in opposite hemispheres along the z axis in the virtual photon-target nucleon center -of-mass frame, with the first hadron produced in the current-fragmentation region and the second in the target-fragmentation region. The data were taken with longitudinally polarized electron beams of 10.2 and 10.6 GeV incident on an unpolarized liquid-hydrogen target using the CLAS12 spectrometer at Jefferson Lab. Observed nonzero sin Delta phi modulations in ep -> e0p pi thorn X events, where Delta phi is the difference of the azimuthal angles of the proton and pion in the virtual photon and target nucleon center-of-mass frame, indicate that correlations between the spin and transverse momenta of hadrons produced in the target-and current-fragmentation regions may be significant. The measured beam-spin asymmetries provide a first access in dihadron production to a previously unexplored leading-twist spin-and transverse-momentum-dependent fracture function. The fracture functions describe the hadronization of the target remnant after the hard scattering of a virtual photon off a quark in the target particle and provide a new avenue for studying nucleonic structure and hadronization.

引用

页数：7

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