Anisotropic flow of identified particles in Pb-Pb collisions at root s(NN)=5.02 TeV



Acharya, S, Acosta, FT, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU
et al (show 1002 more authors) (2018) Anisotropic flow of identified particles in Pb-Pb collisions at root s(NN)=5.02 TeV JOURNAL OF HIGH ENERGY PHYSICS, 2018 (9). 6-. ISSN 1029-8479, 1029-8479

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Abstract

The elliptic (v<inf>2</inf>), triangular (v<inf>3</inf>), and quadrangular (v<inf>4</inf>) flow coefficients of π<sup>±</sup>, K<sup>±</sup>, p+p¯,Λ+Λ¯,KS0, and the ϕ-meson are measured in Pb-Pb collisions at sNN=5.02 TeV. Results obtained with the scalar product method are reported for the rapidity range |y| < 0.5 as a function of transverse momentum, p<inf>T</inf>, at different collision centrality intervals between 0–70%, including ultra-central (0–1%) collisions for π<sup>±</sup>, K<sup>±</sup>, and p + p ¯. For p<inf>T</inf>< 3 GeV/c, the flow coefficients exhibit a particle mass dependence. At intermediate transverse momenta (3 < p<inf>T</inf> < 8–10 GeV/c), particles show an approximate grouping according to their type (i.e., mesons and baryons). The ϕ-meson v<inf>2</inf>, which tests both particle mass dependence and type scaling, follows p + p ¯ v<inf>2</inf> at low p<inf>T</inf> and π<sup>±</sup>v<inf>2</inf> at intermediate p<inf>T</inf>. The evolution of the shape of v<inf>n</inf>(p<inf>T</inf>) as a function of centrality and harmonic number n is studied for the various particle species. Flow coefficients of π<sup>±</sup>, K<sup>±</sup>, and p + p ¯ for p<inf>T</inf> < 3 GeV/c are compared to iEBE-VISHNU and MUSIC hydrodynamical calculations coupled to a hadronic cascade model (UrQMD). The iEBE-VISHNU calculations describe the results fairly well for p<inf>T</inf> < 2.5 GeV/c, while MUSIC calculations reproduce the measurements for p<inf>T</inf> < 1 GeV/c. A comparison to v<inf>n</inf> coefficients measured in Pb-Pb collisions at sNN=2.76 TeV is also provided.[Figure not available: see fulltext.].

Item Type: Article
Uncontrolled Keywords: Heavy Ion Experiments
Depositing User: Symplectic Admin
Date Deposited: 30 Apr 2019 09:20
Last Modified: 22 May 2026 19:32
DOI: 10.1007/JHEP09(2018)006
Open Access URL: https://doi.org/10.1007/JHEP09(2018)006
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3039026
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