Elliptic (v₂) and triangular (v₃) anisotropic flow of identified hadrons from the STAR Beam EnergyScan program

2020/12/12 by P. Parfenov, Parfenov, P.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2012.06759

openalex publication_date 2020/12/12 · openalex created_date 2020/12/21 · openalex updated_date 2026/07/28

Abstract

Elliptic (v₂) and triangular (v₃) anisotropic flow coefficients for inclusive and identified charged hadrons (~π^±, K^±, p, p~) at midrapidity in Au+Au collisions, measured by the STAR experiment in the Beam Energy Scan (BES) at the Relativistic Heavy Ion Collider at √s_NN = 11.5 - 62.4 GeV, are presented. We observe that the triangular flow signal (v₃) of identified hadrons exhibits similar trends as first observed for v₂ in Au+Au collisions, i.e. (i) mass ordering at low transverse momenta, p_T < 2 GeV/c, (ii) meson/baryon splitting at intermediate p_T, 2< p_T < 4 GeV/c, and (iii) difference in flow signal of protons and antiprotons. New measurements of v₃ excitation function could serve as constraints to test different models and to aid new information about the temperature dependence of the transport properties of the strongly interacting matter.

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