The elliptic flow coefficient ($v_{ 2}$) of $\phi$ 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 $\phi$ meson $v_{ 2}$ (by including measurements for other hadrons) has been shown. The results are compared to transport model (AMPT) calculations.
Categories: hep-ex hep-ph