Elliptic flow of strange and multi-strange hadrons in isobar collisions at $\sqrt{s_{\mathrm {NN}}}$ = 200 GeV at RHIC

TL;DR

This study measures the elliptic flow of various strange and multi-strange hadrons in isobar collisions at 200 GeV, revealing differences in nuclear structure and deformation through centrality and size dependence analyses.

Contribution

It provides the first detailed comparison of elliptic flow for strange hadrons in Ru+Ru and Zr+Zr collisions, highlighting nuclear structure effects.

Findings

Deviation from unity in the ratio of average v2 indicates nuclear deformation differences.

Systematic size dependence observed when compared to other heavy-ion collisions.

NCQ scaling tested for all strange and multi-strange hadrons.

Abstract

We report the elliptic flow ($v_{2}$) of $K_{s}^{0}$, $\Lambda$, $\bar{\Lambda}$, $\phi$, $\Xi^{-}$, and $\overline{\Xi}^{+}$ at mid-rapidity for Ru+Ru and Zr+Zr collisions at $\sqrt{s_{\mathrm {NN}}}$ = 200 GeV. The transverse momentum ($p_{T}$) and centrality dependence of $v_{2}$ have been studied. The number of constituent quark (NCQ) scaling for all the (multi-)strange hadrons has also been tested. The dependence in the ratio of average $v_{2}$ ($\langle$$v_{2}$$\rangle$) on centrality shows a deviation from unity indicating a difference in nuclear structure and deformation between the isobars. The results show a systematic size dependence when compared to Cu+Cu, Au+Au, and U+U collisions at similar beam energies.