Search for the chiral magnetic effect in Au plus Au collisions at ?sNN=27 GeV with the STAR forward event plane detectors

被引：12

作者：

Aboona, B. E. ^{[55
]}

Adam, J. ^{[16
]}

Adamczyk, L. ^{[2
]}

Adams, J. R. ^{[40
]}

Aggarwal, I. ^{[42
]}

Aggarwal, M. M. ^{[42
]}

Ahammed, Z. ^{[61
]}

Anderson, D. M. ^{[55
]}

Aschenauer, E. C. ^{[6
]}

Atchisona, J. ^{[1
]}

Bairathi, V. ^{[53
]}

Baker, W. ^{[12
]}

Cap, J. G. Ball ^{[22
]}

Barish, K. ^{[12
]}

Bellwied, R. ^{[22
]}

Bhagat, P. ^{[30
]}

Bhasin, A. ^{[30
]}

Bhatta, S. ^{[52
]}

Bielciko, J. ^{[16
]}

Bielcikova, J. ^{[39
]}

Brandenburg, J. D. ^{[40
]}

Cai, X. Z. ^{[50
]}

Caines, H.

Sanchezi, M. Calderon de la Barca ^{[10
]}

Cebrai, D. ^{[10
]}

Ceskao, J. ^{[16
]}

Chakaberia, I. ^{[33
]}

Chaloupka, P. ^{[16
]}

Chan, B. K. ^{[11
]}

Chang, Z. ^{[28
]}

Chen, D. ^{[12
]}

Chen, J. ^{[49
]}

Chen, J. H. ^{[20
]}

Chen, Z. ^{[49
]}

Cheng, J. ^{[57
]}

Cheng, Y. ^{[11
]}

Choudhury, S. ^{[20
]}

Christie, W. ^{[6
]}

Chu, X. ^{[6
]}

Crawford, H. J. ^{[9
]}

Csanad, M. ^{[18
]}

Dale-Gau, G. ^{[14
]}

Das, A. ^{[16
]}

Daugherity, M. ^{[1
]}

Deppnert, I. M. ^{[21
]}

Dhamija, A. ^{[42
]}

Di Carlobi, L. ^{[63
]}

Didenko, L. ^{[6
]}

Dixitw, P. ^{[24
,25
]}

Dong, X. ^{[33
]}

机构：

[1] Abilene Christian Univ, Abilene, TX 79699 USA

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

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

[4] Amer Univ Cairo, New Cairo 11835, Egypt

[5] Ball State Univ, Muncie, IN 47306 USA

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

[7] Univ Calabria, I-87036 Arcavacata Di Rende, Italy

[8] INFN Cosenza, I-87036 Arcavacata Di Rende, Italy

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

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

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

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

[13] Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China

[14] Univ Illinois, Chicago, IL 60607 USA

[15] Creighton Univ, Omaha, NE 68178 USA

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

[17] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

[18] Eotvos Lorand Univ, H-1117 Budapest, Hungary

[19] Frankfurt Inst Adv Studies FIAS, D-60438 Frankfurt, Germany

[20] Fudan Univ, Shanghai 200433, Peoples R China

[21] Heidelberg Univ, D-69120 Heidelberg, Germany

[22] Univ Houston, Houston, TX 77204 USA

[23] Huzhou Univ, Huzhou 313000, Zhejiang, Peoples R China

[24] Indian Inst Sci Educ & Res IISER, Berhampur 760010, India

[25] Indian Inst Sci Educ & Res IISER, Berhampur 760010, India

[26] Indian Inst Sci Educ & Res IISER Tirupati, Tirupati 517507, Andhra Pradesh, India

[27] Indian Inst Technol, Patna 801106, Bihar, India

[28] Indiana Univ, Bloomington, IN 47408 USA

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

[30] Univ Jammu, Jammu 180001, India

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

[32] Univ Kentucky, Lexington, KY 40506 USA

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

[34] Lehigh Univ, Bethlehem, PA 18015 USA

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

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

[37] HBNI, Natl Inst Sci Educ & Res, Jatni 752050, India

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

[39] CAS, Inst Nucl Phys, Rez 25068, Czech Republic

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

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

[42] Panjab Univ, Chandigarh 160014, India

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

[44] Rice Univ, Houston, TX 77251 USA

[45] Rutgers State Univ, Piscataway, NJ 08854 USA

[46] Univ Sao Paulo, BR-05314970 Sao Paulo, Brazil

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

[48] South China Normal Univ, Guangzhou 510631, Guangdong, Peoples R China

[49] Shandong Univ, Qingdao 266237, Shandong, Peoples R China

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

来源：

PHYSICS LETTERS B | 2023年 / 839卷

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; 日本学术振兴会;

关键词：

Chiral magnetic effect; Heavy-ion collisions; Beam energy scan; HEAVY-ION COLLISIONS; FIELD; QCD;

D O I：

10.1016/j.physletb.2023.137779

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A decisive experimental test of the Chiral Magnetic Effect (CME) is considered one of the major scientific goals at the Relativistic Heavy-Ion Collider (RHIC) towards understanding the nontrivial topological fluctuations of the Quantum Chromodynamics vacuum. In heavy-ion collisions, the CME is expected to result in a charge separation phenomenon across the reaction plane, whose strength could be strongly energy dependent. The previous CME searches have been focused on top RHIC energy collisions. In this Letter, we present a low energy search for the CME in Au+Au collisions at root sNN = 27 GeV. We measure elliptic flow scaled charge-dependent correlators relative to the event planes that are defined at both mid-rapidity |tj| < 1.0 and at forward rapidity 2.1 < | | < 5.1. We compare the results based on the directed flow plane (W1) at forward rapidity and the elliptic flow plane (0112) at both central and forward rapidity. The CME scenario is expected to result in a larger correlation relative to x111 than to 'I'2, while a flow driven background scenario would lead to a consistent result for both event planes. In 10-50% centrality, results using three different event planes are found to be consistent within experimental uncertainties, suggesting a flow driven background scenario dominating the measurement. We obtain an upper limit on the deviation from a flow driven background scenario at the 95% confidence level. This work opens up a possible road map towards future CME search with the high statistics data from the RHIC Beam Energy Scan Phase-II.(c) 2023 Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

引用

页数：10

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