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

STAR Collaboration

doi:10.1016/j.physletb.2022.137003

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

STAR Collaboration

Chemistry

American University in Cairo
Texas A&M University
Brookhaven National Laboratory
AGH University of Krakow
Ohio State University
University of Kentucky
Joint Institute for Nuclear Research
Panjab University
Variable Energy Cyclotron Centre India
Alikhanov Institute for Theoretical and Experimental Physics
Moscow Engineering Physics Institute
Central China Normal University
Kent State University
Universidad de Tarapacá
University of California at Riverside
University of Houston
Stony Brook University
University of Jammu
Czech Technical University in Prague
Czech Academy of Sciences
Rice University
Chinese Academy of Sciences
Yale University
University of California at Davis
Lawrence Berkeley National Laboratory
University of California at Los Angeles
National Cheng Kung University
Shandong University
Fudan University

Research output: Contribution to journal › Article › peer-review

97 Scopus citations

Abstract

We report on the measurements of directed flow v₁ and elliptic flow v₂ for hadrons (π^±, K^±, K_S⁰, p, ϕ, Λ and Ξ⁻) from Au+Au collisions at s_NN=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.

Original language	English
Article number	137003
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	827
DOIs	https://doi.org/10.1016/j.physletb.2022.137003
State	Published - Apr 10 2022

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10.1016/j.physletb.2022.137003

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@article{d9a9fb707a3946e4a204d6f13ffc915d,

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

abstract = "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.",

author = "\{STAR Collaboration\} and Abdallah, \{M. S.\} and Aboona, \{B. E.\} and J. Adam and L. Adamczyk and Adams, \{J. R.\} and Adkins, \{J. K.\} and G. Agakishiev and I. Aggarwal and Aggarwal, \{M. M.\} and Z. Ahammed and I. Alekseev and Anderson, \{D. M.\} and A. Aparin and Aschenauer, \{E. C.\} and Ashraf, \{M. U.\} and Atetalla, \{F. G.\} and A. Attri and Averichev, \{G. S.\} and V. Bairathi and W. Baker and \{Ball Cap\}, \{J. G.\} and K. Barish and A. Behera and R. Bellwied and P. Bhagat and A. Bhasin and J. Bielcik and J. Bielcikova and Bordyuzhin, \{I. G.\} and Brandenburg, \{J. D.\} and Brandin, \{A. V.\} and I. Bunzarov and J. Butterworth and Cai, \{X. Z.\} and H. Caines and \{Calder{\'o}n de la Barca S{\'a}nchez\}, M. and D. Cebra and I. Chakaberia and P. Chaloupka and Chan, \{B. K.\} and Chang, \{F. H.\} and Z. Chang and N. Chankova-Bunzarova and A. Chatterjee and S. Chattopadhyay and D. Chen and J. Chen and Chen, \{J. H.\} and J. Jia and R. Lacey",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s)",

year = "2022",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2022.137003",

language = "English",

volume = "827",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

}

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 - Jia, J.

AU - Lacey, R.

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.

UR - https://www.scopus.com/pages/publications/85125955273

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 -

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

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