Anisotropic Flow of Identified Particles in Au + Au Collisions at $\sqrt{s_{NN}}$ = 3-3.9 GeV at RHIC

Abstract

In these proceedings, we present transverse momentum dependence of the mid-rapidity slope of directed flow ($d{v}_1/dy{|}_{y=0}$) for ${\pi }^{+}$ and $K_S^0$ in Au + Au collisions at $\sqrt{s_{NN}}$ = 3.0, 3.2, 3.5, and 3.9 GeV. Both ${\pi }^{+}$ and $K_S^0$ show negative $v_1$ slope at low $p_T$ ($p_T<0.6$ GeV/$c$). Collision energy dependence of $v_1$ slope and $p_T$-integrated $v_2$ for ${\pi }^{\pm }$, $K_S^0$, and $\Lambda$ are also presented. A comparison to JAM model calculations indicates that spectator shadowing can lead to anti-flow at low $p_T$. In addition, a breaking of the Number of Constitute Quark (NCQ) scaling of elliptic flow ($v_2$) is observed at $\sqrt{s_{NN}}$ = 3.2 GeV, which implies the dominance of hadronic degrees of freedom occurs in collisions at $\sqrt{s_{NN}}$ = 3.2 GeV and below.

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Cited by in corpus (2)

• Anti-flow of Mesons in the High Baryon Density Region
• Measurement of Kaon Directed Flow in Au+Au Collisions in the High Baryon Density Region