Charge-Dependent Directed Flow in Cu plus Au Collisions at √SNN=200 GeV

被引：25

作者：

Adamczyk, L. ^{[1
]}

Adkins, J. K. ^{[20
]}

Agakishiev, G. ^{[18
]}

Aggarwal, M. M. ^{[32
]}

Ahammed, Z. ^{[50
]}

Alekseev, I. ^{[16
,27
]}

Anderson, D. M. ^{[43
]}

Aoyama, R. ^{[3
]}

Aparin, A. ^{[18
]}

Arkhipkin, D. ^{[3
]}

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

Ashraf, M. U. ^{[46
]}

Attri, A. ^{[32
]}

Averichev, G. S. ^{[18
]}

Bai, X. ^{[7
]}

Bairathi, V. ^{[28
]}

Bellwied, R. ^{[45
]}

Bhasin, A. ^{[17
]}

Bhati, A. K. ^{[32
]}

Bhattarai, P. ^{[44
]}

Bielcik, J. ^{[10
]}

Bielcikova, J. ^{[11
]}

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

Bordyuzhin, I. G. ^{[16
]}

Bouchet, J. ^{[19
]}

Brandenburg, J. D. ^{[37
]}

Brandin, A. V. ^{[27
]}

Bunzarov, I. ^{[18
]}

Butterworth, J. ^{[37
]}

Caines, H. ^{[54
]}

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

Campbell, J. M. ^{[30
]}

Cebra, D. ^{[5
]}

Chakaberia, I. ^{[3
]}

Chaloupka, P. ^{[10
]}

Chang, Z. ^{[43
]}

Chatterjee, A. ^{[50
]}

Chattopadhyay, S. ^{[50
]}

Chen, X. ^{[22
]}

Chen, J. H. ^{[40
]}

Cheng, J. ^{[46
]}

Cherney, M. ^{[9
]}

Christie, W. ^{[3
]}

Contin, G. ^{[23
]}

Crawford, H. J. ^{[4
]}

Das, S. ^{[13
]}

De Silva, L. C. ^{[9
]}

Debbe, R. R. ^{[3
]}

Dedovich, T. G. ^{[18
]}

Deng, J. ^{[39
]}

机构：

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

[2] Argonne Natl Lab, 9700 S Cass Ave, 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, Hubei, 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 FIAS, D-60438 Frankfurt, Germany

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

[14] Indian Inst Technol, Bombay 400076, Maharashtra, India

[15] Indiana Univ, Bloomington, IN 47408 USA

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

[17] Univ Jammu, Jammu 180001, India

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

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

[20] Univ Kentucky, Lexington, KY 40506 USA

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

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

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

[24] Lehigh Univ, Bethlehem, PA 18015 USA

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

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

[27] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

[28] Natl Inst Sci Educ & Res, Bhubaneswar 751005, Orissa, India

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

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

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

[32] Panjab Univ, Chandigarh 160014, India

[33] Penn State Univ, University Pk, PA 16802 USA

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

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

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

[37] Rice Univ, Houston, TX 77251 USA

[38] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

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

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

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

[42] Temple Univ, Philadelphia, PA 19122 USA

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

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

[45] Univ Houston, Houston, TX 77204 USA

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

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

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

[49] Valparaiso Univ, Valparaiso, IN 46383 USA

[50] Variable Energy Cyclotron Ctr, Kolkata 700064, India

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 01期

基金：

中国国家自然科学基金; 新加坡国家研究基金会; 美国国家科学基金会;

关键词：

ENERGY NUCLEAR COLLISIONS; QUARK-GLUON PLASMA; VIOLATION; MOMENTUM; PARITY;

D O I：

10.1103/PhysRevLett.118.012301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first measurement of charge-dependent directed flow in Cu + Au collisions at root S-NN = 200 GeV. The results are presented as a function of the particle transverse momentum and pseudorapidity for different centralities. A finite difference between the directed flow of positive and negative charged particles is observed that qualitatively agrees with the expectations from the effects of the initial strong electric field between two colliding ions with different nuclear charges. The measured difference in directed flow is much smaller than that obtained from the parton-hadron-string-dynamics model, which suggests that most of the electric charges, i.e., quarks and antiquarks, have not yet been created during the lifetime of the strong electric field, which is of the order of, or less than, 1 fm/c.

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