TY - JOUR
T1 - Disappearance of partonic collectivity in sNN=3 GeV Au+Au collisions at RHIC
AU - STAR Collaboration
AU - Abdallah, M. S.
AU - Aboona, B. E.
AU - Adam, J.
AU - Adamczyk, L.
AU - Adams, J. R.
AU - Adkins, J. K.
AU - Agakishiev, G.
AU - Aggarwal, I.
AU - Aggarwal, M. M.
AU - Ahammed, Z.
AU - Alekseev, I.
AU - Anderson, D. M.
AU - Aparin, A.
AU - Aschenauer, E. C.
AU - Ashraf, M. U.
AU - Atetalla, F. G.
AU - Attri, A.
AU - Averichev, G. S.
AU - Bairathi, V.
AU - Baker, W.
AU - Ball Cap, J. G.
AU - Barish, K.
AU - Behera, A.
AU - Bellwied, R.
AU - Bhagat, P.
AU - Bhasin, A.
AU - Bielcik, J.
AU - Bielcikova, J.
AU - Bordyuzhin, I. G.
AU - Brandenburg, J. D.
AU - Brandin, A. V.
AU - Bunzarov, I.
AU - Butterworth, J.
AU - Cai, X. Z.
AU - Caines, H.
AU - Calderón de la Barca Sánchez, M.
AU - Cebra, D.
AU - Chakaberia, I.
AU - Chaloupka, P.
AU - Chan, B. K.
AU - Chang, F. H.
AU - Chang, Z.
AU - Chankova-Bunzarova, N.
AU - Chatterjee, A.
AU - Chattopadhyay, S.
AU - Chen, D.
AU - Chen, J.
AU - Chen, J. H.
AU - Chen, X.
AU - Yang, Y.
N1 - Publisher Copyright:
© 2022 The Author(s)
PY - 2022/4/10
Y1 - 2022/4/10
N2 - 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.
AB - 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.
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U2 - 10.1016/j.physletb.2022.137003
DO - 10.1016/j.physletb.2022.137003
M3 - Article
AN - SCOPUS:85125955273
SN - 0370-2693
VL - 827
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 137003
ER -