Hyperon Polarization along the Beam Direction Relative to the Second and Third Harmonic Event Planes in Isobar Collisions at √sNN=200 GeV

被引：5

作者：

Abdulhamid, M., I ^{[4
]}

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

Adam, J. ^{[16
]}

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

Agakishiev, G. ^{[30
]}

Aggarwa, I ^{[41
]}

Aggarwal, M. M. ^{[41
]}

Ahammed, Z. ^{[61
]}

Aitbaev, A. ^{[30
]}

Alekseev, I ^{[2
,37
]}

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

Aparin, A. ^{[30
]}

Aslam, S. ^{[26
]}

Atchison, J. ^{[1
]}

Averichev, G. S. ^{[30
]}

Bairathi, V ^{[53
]}

Baker, W. ^{[12
]}

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

Barish, K. ^{[12
]}

Bhagat, P. ^{[29
]}

Bhasin, A. ^{[29
]}

Bhatta, S. ^{[52
]}

Bordyuzhin, I. G. ^{[2
]}

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

Brandin, A., V ^{[37
]}

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

Caines, H. ^{[63
]}

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

Cebra, D. ^{[10
]}

Ceska, J. ^{[16
]}

Chakaberia, I ^{[33
]}

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

Chang, Z. ^{[27
]}

Chatterjee, A. ^{[17
]}

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
]}

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

Das, A. ^{[16
]}

Daugherity, M. ^{[1
]}

Dedovich, T. G. ^{[30
]}

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

Derevschikov, A. A. ^{[42
]}

机构：

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

[2] NRC Kurchatov Inst, Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia

[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] Natl Inst Technol Durgapur, Durgapur 713209, India

[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 Tirupati, Tirupati 517507, India

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

[27] Indiana Univ, Bloomington, IN 47408 USA

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

[29] Univ Jammu, Jammu 180001, India

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

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

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

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

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

[41] Panjab Univ, Chandigarh 160014, India

[42] Inst High Energy Phys, NRC Kurchatov Inst, Protvino 142281, Russia

[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 Sci & Technol China, Hefei 230026, Anhui, Peoples R China

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

[48] Sejong Univ, Seoul 05006, South Korea

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

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

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 20期

基金：

日本学术振兴会; 新加坡国家研究基金会; 美国国家科学基金会; 中国国家自然科学基金;

关键词：

All Open Access; Green;

D O I：

10.1103/PhysRevLett.131.202301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The polarization of Lambda and (Lambda) over bar hyperons along the beam direction has been measured relative to the second and third harmonic event planes in isobar Ru thorn Ru and Zr thorn Zr collisions at root s(NN) = 200 GeV. This is the first experimental evidence of the hyperon polarization by the triangular flow originating from the initial density fluctuations. The amplitudes of the sine modulation for the second and third harmonic results are comparable in magnitude, increase from central to peripheral collisions, and show a mild p(T) dependence. The azimuthal angle dependence of the polarization follows the vorticity pattern expected due to elliptic and triangular anisotropic flow, and qualitatively disagrees with most hydrodynamic model calculations based on thermal vorticity and shear induced contributions. The model results based on one of existing implementations of the shear contribution lead to a correct azimuthal angle dependence, but predict centrality and pT dependence that still disagree with experimental measurements. Thus, our results provide stringent constraints on the thermal vorticity and shear-induced contributions to hyperon polarization. Comparison to previous measurements at RHIC and the LHC for the second-order harmonic results shows little dependence on the collision system size and collision energy.

引用

页数：8

共 15 条

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