Anisotropic flow of (multi-)strange hadrons in Au+Au collisions in BES-II energies at STAR

TL;DR

This study measures the elliptic and triangular flow of strange and multi-strange hadrons in Au+Au collisions at 19.6 GeV, revealing insights into quark dynamics and collective behavior at BES-II energies.

Contribution

It provides detailed flow measurements and scaling behaviors of strange hadrons at BES-II energies, highlighting differences between particles and antiparticles.

Findings

Better NCQ scaling for antiparticles than particles

Hydrodynamic ratio v3/v2^{3/2} analyzed as a function of pT

Flow dependence on centrality and particle type

Abstract

In these proceedings, we report the elliptic ($v_{2}$) and triangular ($v_{3}$) flow measurements of strange and multi-strange hadrons such as $K_{S}^{0}$, ~$\Lambda$($\bar{\Lambda}$), ~$\phi$, ~$\Xi^{-}$($\bar{\Xi}^{+}$), and $\Omega^{-}$($\bar{\Omega}^{+}$) at mid-rapidity ($|y| < 1.0$) in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV using high statistics Beam Energy Scan Phase-II (BES-II) data. The transverse momentum ($p_{T}$) dependence, centrality dependence, and the number of constituent quarks (NCQ) scaling of $v_{2}$ and $v_{3}$ are studied for all these particles. A better NCQ scaling is observed in the case of antiparticles compared to particles, which can be attributed to the contribution from the transported quarks in particles. The hydrodynamically motivated ratio ($v_{3}/v_{2}^{3/2}$) is presented as a function of $p_{T}$.