Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb-Pb collisions at root s(NN)=2.76 TeV
文献类型：期刊论文
| 作者 | Acharya, S; Adamova, D; Adhya, SP; Adler, A; Adolfsson, J; Aggarwal, MM; Rinella, GA; Agnello, M; Agrawal, N; Ahammed, Z |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2020 |
| 卷号 | 804页码:- |
| ISSN号 | 0370-2693 |
| 关键词 | QUARK-GLUON PLASMA ANGULAR-CORRELATIONS AU COLLISIONS PERSPECTIVE VISCOSITY |
| DOI | 10.1016/j.physletb.2020.135375 |
| 文献子类 | 期刊论文 |
| 英文摘要 | 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/). |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32982]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Grp Collegato INFN, Salerno, Italy 2.COMSATS Univ Islamabad, Islamabad, Pakistan 3.Creighton Univ, Omaha, NE 68178 USA 4.Sezione Ist Nazl Fis Nucl, Turin, Italy 5.Univ Bologna, Dipartimento Fis & Astron, Bologna, Italy 6.Sezione Ist Nazl Fis Nucl, Bologna, Italy 7.Univ Catania, Dipartimento Fis & Astron, Catania, Italy 8.Sezione Ist Nazl Fis Nucl, Catania, Italy 9.Univ Padua, Dipartimento Fis & Astron, Padua, Italy 10.Sezione Ist Nazl Fis Nucl, Padua, Italy |
| 推荐引用方式 GB/T 7714 | Acharya, S,Adamova, D,Adhya, SP,et al. Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb-Pb collisions at root s(NN)=2.76 TeV[J]. PHYSICS LETTERS B,2020,804:-. |
| APA | Acharya, S.,Adamova, D.,Adhya, SP.,Adler, A.,Adolfsson, J.,...&Zurlo, N.(2020).Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb-Pb collisions at root s(NN)=2.76 TeV.PHYSICS LETTERS B,804,-. |
| MLA | Acharya, S,et al."Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb-Pb collisions at root s(NN)=2.76 TeV".PHYSICS LETTERS B 804(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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