Disappearance of partonic collectivity in sNN=3 GeV Au+Au collisions at RHIC

STAR Collaboration

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

We report on the measurements of directed flow v1 and elliptic flow v2 for hadrons (π±, K±, KS0, p, ϕ, Λ and Ξ) from Au+Au collisions at sNN=3 GeV and v2 for (π±, K±, p and p‾) at 27 and 54.4 GeV with the STAR experiment. While at the two higher energy midcentral collisions the number-of-constituent-quark (NCQ) scaling holds, at 3 GeV the v2 at midrapidity is negative for all hadrons and the NCQ scaling is absent. In addition, the v1 slopes at midrapidity for almost all observed hadrons are found to be positive, implying dominant repulsive baryonic interactions. The features of negative v2 and positive v1 slope at 3 GeV can be reproduced with a baryonic mean-field in transport model calculations. These results imply that the medium in such collisions is likely characterized by baryonic interactions.

原文English
文章編號137003
期刊Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
827
DOIs
出版狀態Published - 2022 4月 10

All Science Journal Classification (ASJC) codes

  • 核能與高能物理

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