Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb-Pb collisions at √sNN=2.76 TeV

被引:10
作者
Acharya, S. [155 ]
Adamova, D. [106 ]
Adhya, S. P. [155 ]
Adler, A. [86 ]
Adolfsson, J. [92 ]
Aggarwal, M. M. [111 ]
Rinella, G. Aglieri [47 ]
Agnello, M. [33 ,42 ]
Agrawal, N. [12 ,13 ,61 ,66 ]
Ahammed, Z. [155 ]
Ahmad, S. [20 ]
Ahn, S. U. [88 ]
Akindinov, A. [103 ]
Al-Turany, M. [118 ,119 ]
Alam, S. N. [155 ]
Albuquerque, D. S. D. [136 ]
Aleksandrov, D. [99 ]
Alessandro, B. [71 ]
Alfanda, H. M. [7 ]
Alfaro Molina, R. [84 ]
Ali, B. [20 ]
Ali, Y. [18 ]
Alici, A. [12 ,13 ,34 ,35 ,66 ]
Alkin, A. [2 ]
Alme, J. [25 ]
Alt, T. [81 ]
Altenkamper, L. [25 ]
Altsybeev, I [126 ]
Anaam, M. N. [7 ]
Andrei, C. [60 ]
Andreou, D. [47 ]
Andrews, H. A. [123 ]
Andronic, A. [158 ]
Angeletti, M. [47 ]
Anguelov, V [115 ]
Anson, C. [19 ]
Anticic, T. [120 ]
Antinori, F. [69 ]
Antonioli, P. [66 ]
Anwar, R. [139 ]
Apadula, N. [91 ]
Aphecetche, L. [128 ]
Appelshaeuser, H. [81 ]
Arcelli, S. [34 ,35 ]
Arnaldi, R. [71 ]
Arratia, M. [91 ]
Arsene, I. C. [24 ]
Arslandok, M. [115 ]
Augustinus, A. [47 ]
Averbeck, R. [118 ,119 ]
机构
[1] Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia
[2] Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine
[3] Bose Inst, Dept Phys, Kolkata, India
[4] Bose Inst, Ctr Astroparticle Phys & Space Sci CAPSS, Kolkata, India
[5] Budker Inst Nucl Phys, Novosibirsk, Russia
[6] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA
[7] Cent China Normal Univ, Wuhan, Peoples R China
[8] IN2P3, Ctr Calcul, Lyon, France
[9] Ctr Aplicac Tecnol & Desarrollo Nucl CEADEN, Havana, Cuba
[10] CINVESTAV, Ctr Invest & Estudios Avanzados, Mexico City, DF, Mexico
[11] CINVESTAV, Ctr Invest & Estudios Avanzados, Merida, Yucatan, Mexico
[12] Museo Stor Fis, Ctr Fermi, Rome, Italy
[13] Ctr Studi & Ric Enrico Fermi, Rome, Italy
[14] Chicago State Univ, Chicago, IL USA
[15] China Inst Atom Energy, Beijing, Peoples R China
[16] Chonbuk Natl Univ, Jeonju, South Korea
[17] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia
[18] COMSATS Univ Islamabad, Islamabad, Pakistan
[19] Creighton Univ, Omaha, NE 68178 USA
[20] Aligarh Muslim Univ, Dept Phys, Aligarh, Uttar Pradesh, India
[21] Pusan Natl Univ, Dept Phys, Pusan, South Korea
[22] Sejong Univ, Dept Phys, Seoul, South Korea
[23] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[24] Univ Oslo, Dept Phys, Oslo, Norway
[25] Univ Bergen, Dept Phys & Technol, Bergen, Norway
[26] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy
[27] Sezione Ist Nazl Fis Nucl, Rome, Italy
[28] Univ Cagliari, Dipartimento Fis, Cagliari, Italy
[29] Sezione Ist Nazl Fis Nucl, Cagliari, Italy
[30] Univ Trieste, Dipartimento Fis, Trieste, Italy
[31] Sezione Ist Nazl Fis Nucl, Trieste, Italy
[32] Univ Turin, Dipartimento Fis, Turin, Italy
[33] Sezione Ist Nazl Fis Nucl, Turin, Italy
[34] Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy
[35] Sezione Ist Nazl Fis Nucl, Bologna, Italy
[36] Univ Catania, Dipartimento Fis & Astron, Catania, Italy
[37] Sezione Ist Nazl Fis Nucl, Catania, Italy
[38] Univ Padua, Dipartimento Fis & Astron, Padua, Italy
[39] Sezione Ist Nazl Fis Nucl, Padua, Italy
[40] Univ Salerno, Dipartimento Fis ER Caianiello, Salerno, Italy
[41] Grp Collegato INFN, Salerno, Italy
[42] Politecn Torino, Dipartimento DISAT, Turin, Italy
[43] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, Alessandria, Italy
[44] INFN, Sez Torino, Alessandria, Italy
[45] Dipartimento Interateneo Fis M Merlin, Bari, Italy
[46] Sezione Ist Nazl Fis Nucl, Bari, Italy
[47] CERN, European Org Nucl Res, Geneva, Switzerland
[48] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[49] Western Norway Univ Appl Sci, Fac Engn & Sci, Bergen, Norway
[50] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic
基金
奥地利科学基金会; 美国能源部; 中国国家自然科学基金; 巴西圣保罗研究基金会; 新加坡国家研究基金会; 美国国家科学基金会; 俄罗斯科学基金会; 英国科学技术设施理事会; 瑞典研究理事会; 日本学术振兴会;
关键词
QUARK-GLUON PLASMA; ANGULAR-CORRELATIONS; AU COLLISIONS; PERSPECTIVE; VISCOSITY;
D O I
10.1016/j.physletb.2020.135375
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
This paper presents the first measurements of the charge independent (CI) and charge dependent (CD) two-particle transverse momentum correlators G(2)(CI) and G(2)(CD) in Pb-Pb collisions at root sNN= 2.76 TeVby the ALICE collaboration. The two-particle transverse momentum correlator G(2) was introduced as a measure of the momentum current transfer between neighboringsystem cells. The correlators are measured as a function of pair separation in pseudorapidity (Delta eta) and azimuth (Delta phi) and as a function of collision centrality. From peripheral to central collisions, the correlator G(2)(CI) exhibits a longitudinal broadening while undergoing a monotonic azimuthal narrowing. By contrast, G(2)(CD) exhibits a narrowing along both dimensions. These features are not reproduced by models such as HIJING and AMPT. However, the observed narrowing of the correlators from peripheral to central collisions is expected to result from the stronger transverse flow profiles produced in more central collisions and the longitudinal broadening is predicted to be sensitive to momentum currents and the shear viscosity per unit of entropy density./sof the matter produced in the collisions. The observed broadening is found to be consistent with the hypothesized lower bound of eta/s and is in qualitative agreement with values obtained from anisotropic flow measurements. (c) 2020 Conseil Europeen pour la Recherche Nucleaire,. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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页数:13
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