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(2021)
Disappearance of partonic collectivity in √s
Full text not available from this repository.
Official URL: https://arxiv.org/abs/2108.00908v1
Related URL: http://dx.doi.org/arXiv:2108.00908
Abstract
We report on the measurements of directed flow v1 and elliptic flow v2 for hadrons (π±, K±, K0S, 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 midrapidity v2 is negative for all hadrons and the NCQ scaling is absent. In addition, the midrapidity v1 slopes 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 in 3 GeV Au+Au collisions, the medium is characterized by baryonic interactions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Arxiv Publications. |
| ID Code: | 124521 |
| Deposited On: | 25 Nov 2021 09:57 |
| Last Modified: | 25 Nov 2021 09:57 |
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