Measurement of the cross section and longitudinal double-spin asymmetry for dijet production in polarized pp collisions at √s=200 GeV

被引：26

作者：

Adamczyk, L. ^{[1
]}

Adkins, J. K. ^{[19
]}

Agakishiev, G. ^{[17
]}

Aggarwal, M. M. ^{[31
]}

Ahammed, Z.

Ajitanand, N. N. ^{[40
]}

Alekseev, I. ^{[15
,26
]}

Anderson, D. M. ^{[42
]}

Aoyama, R. ^{[46
]}

Aparin, A. ^{[17
]}

Arkhipkin, D. ^{[3
]}

Aschenauer, E. C. ^{[3
]}

Ashraf, M. U. ^{[45
]}

Attri, A. ^{[31
]}

Averichev, G. S. ^{[17
]}

Bai, X. ^{[7
]}

Bairathi, V. ^{[27
]}

Barish, K.

Behera, A. ^{[40
]}

Bellwied, R. ^{[44
]}

Bhasin, A. ^{[16
]}

Bhati, A. K. ^{[31
]}

Bhattarai, P. ^{[43
]}

Bielcik, J. ^{[10
]}

Bielcikova, J. ^{[11
]}

Bland, L. C. ^{[3
]}

Bordyuzhin, I. G. ^{[15
]}

Bouchet, J. ^{[18
]}

Brandenburg, J. D. ^{[36
]}

Brandin, A. V. ^{[26
]}

Brown, D. ^{[23
]}

Bunzarov, I. ^{[17
]}

Butterworth, J. ^{[36
]}

Caines, H. ^{[55
]}

Sanchez, M. Calderon de la Barca ^{[5
]}

Campbell, J. M. ^{[29
]}

Cebra, D. ^{[5
]}

Chakaberia, I. ^{[3
]}

Chaloupka, P. ^{[10
]}

Chang, Z. ^{[42
]}

Chankova-Bunzarova, N. ^{[17
]}

Chatterjee, A. ^{[51
]}

Chattopadhyay, S. ^{[51
]}

Chen, X. ^{[21
,37
]}

Chen, J. H. ^{[39
]}

Cheng, J. ^{[45
]}

Cherney, M. ^{[9
]}

Christie, W. ^{[3
]}

Contin, G. ^{[22
]}

机构：

[1] AGH Univ Sci & Technol, FPACS, PL-30059 Krakow, Poland

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

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

[4] Univ Calif Berkeley, Berkeley, CA 94720 USA

[5] Univ Calif Davis, Davis, CA 95616 USA

[6] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[7] Cent China Normal Univ, Wuhan 430079, Hunan, Peoples R China

[8] Univ Illinois, Chicago, IL 60607 USA

[9] Creighton Univ, Omaha, NE 68178 USA

[10] Czech Tech Univ, FNSPE, Prague 11519, Czech Republic

[11] Nucl Phys Inst AS CR, Prague 25068, Czech Republic

[12] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[13] Inst Phys, Bhubaneswar 751005, Orissa, India

[14] Indiana Univ, Bloomington, IN 47408 USA

[15] Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia

[16] Univ Jammu, Jammu 180001, India

[17] Joint Inst Nucl Res, Dubna 141980, Russia

[18] Kent State Univ, Kent, OH 44242 USA

[19] Univ Kentucky, Lexington, KY 40506 USA

[20] Lamar Univ, Phys Dept, Beaumont, TX 77710 USA

[21] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China

[22] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[23] Lehigh Univ, Bethlehem, PA 18015 USA

[24] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[25] Michigan State Univ, E Lansing, MI 48824 USA

[26] Nat Res Nucl Univ MEPhI, Moscow 115409, Russia

[27] Nat Inst Sci Educ & Res, Bhubaneswar 751005, Orissa, India

[28] Natl Cheng Kung Univ, Tainan 70101, Taiwan

[29] Ohio State Univ, Columbus, OH 43210 USA

[30] Inst Nucl Phys PAN, PL-31342 Krakow, Poland

[31] Panjab Univ, Chandigarh 160014, India

[32] Penn State Univ, University Pk, PA USA

[33] Inst High Energy Phys, Protvino 142281, Russia

[34] Purdue Univ, W Lafayette, IN 47907 USA

[35] Pusan Natl Univ, Pusan 46241, South Korea

[36] Rice Univ, Houston, TX 77251 USA

[37] Univ Sci & Technol China, Anhua 230026, Peoples R China

[38] Shandong Univ, Jinan 250100, Peoples R China

[39] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[40] SUNY Stony Brook, Stony Brook, NY 11794 USA

[41] Temple Univ, Philadelphia, PA 19122 USA

[42] Texas A&M Univ, College Stn, TX 77843 USA

[43] Univ Texas Austin, Austin, TX 78712 USA

[44] Univ Houston, Houston, TX 77204 USA

[45] Tsinghua Univ, Beijing 100084, Peoples R China

[46] Univ Tsukuba, Tsukuba, Ibaraki 3058571, Japan

[47] Southern Connecticut State Univ, New Haven, CT 06515 USA

[48] Univ Calif Riverside, Riverside, CA 92521 USA

[49] US Naval Acad, Annapolis, MD 21402 USA

[50] Valparaiso Univ, Valparaiso, IN 46383 USA

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 07期

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

PARTON DISTRIBUTIONS; SCATTERING;

D O I：

10.1103/PhysRevD.95.071103

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first measurement of the longitudinal double-spin asymmetry A(LL) for midrapidity dijet production in polarized pp collisions at a center-of-mass energy of root s = 200 GeV. The dijet cross section was measured and is shown to be consistent with next-to-leading order (NLO) perturbative QCD predictions. A(LL) results are presented for two distinct topologies, defined by the jet pseudorapidities, and are compared to predictions from several recent NLO global analyses. The measured asymmetries, the first such correlation measurements, support those analyses that find positive gluon polarization at the level of roughly 0.2 over the region of Bjorken-x > 0.05.

引用

页数：8

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