Evidence of Coalescence Sum Rule in Elliptic Flow of Identified Particles in High-energy Heavy-ion Collisions

Abstract

The major goal of high-energy heavy-ion collisions is to study the properties of the deconfined quark gluon plasma (QGP), such as partonic collectivity. The collective motion of constituent quarks can be derived from the anisotropic flow measurements of identified hadrons within the coalescence framework. Based on published results of elliptic flow ($v_2$), we shall test the coalescence sum rule using $K^{\pm }$, $p$, $\bar{p}$, $\Lambda$ and $\bar{\Lambda }$, and further extract $v_2$ values for produced $u$($d$, $\bar{u}$, $\bar{d}$), $s$ and $\bar{s}$ quarks, as well as transported $u(d)$ quarks in 10-40\% Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=$ 7.7, 11.5, 14.5, 19.6, 27, 39 and 62.4 GeV. We also attempt to link the $v_2$ difference between ${\pi }^{-}$ and ${\pi }^{+}$ to the different numbers of $u$ and $d$ quarks in the initial gold ions, and to relate the $v_2$ measurements of multi-strange hadrons to the formation times of $\varphi$, ${\Omega }^{\pm }$ and ${\Xi }^{+}$.

arXiv comment6 pages, 5 figures, 1 table. Accepted by Phys. Lett. B

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Cited by in corpus (3)

• Testing the impact of electromagnetic fields on the directed flow of constituent quarks in heavy-ion collisions
• Violation of NCQ scaling in hadron elliptic flow in Au+Au collisions at $\sqrt{s_{NN}}=3.0-7.7GeV
• Examining the influence of hadronic interactions on the directed flow of identified particles in RHIC Beam Energy Scan energies using UrQMD model