Azimuthal anisotropy measurement of $\varphi$ mesons in Au+Au collisions at $\sqrt{s_{NN}}$ = 27 and 54.4 GeV at STAR

Abstract

The elliptic flow coefficient ($v_2$) of $\varphi$ mesons at mid-rapidity as a function of transverse momentum ($p_T$) is measured for Au+Au collisions at centre of mass energy ($\sqrt{s_{NN}}$) 27 and 54.4 GeV. The $v_2$ measurement is done using event plane from Time Projection Chamber (TPC, $|\eta |$ $<$1.0) and Event Plane Detectors (EPD, 2.1$<$$|\eta |$$<$5.1) for 54.4 and 27 GeV, respectively. A high precision test of the number of constituent quark scaling of $\varphi$ meson $v_2$ (by including measurements for other hadrons) has been shown. The results are compared to transport model (AMPT) calculations.

proceeding paper submitted to XXIV DAE-BRNS high energy physics symposium