28 November 2022 to 2 December 2022
Europe/Zurich timezone

Azimuthal anisotropic flow of identified hadrons in Au+Au collisions in BES-II energies

30 Nov 2022, 17:50
20m

Speaker

Prabhupada Dixit

Description

Anisotropic flow of the final state particles produced in heavy-ion collisions is one of the important probes to study the properties of the matter produced in the collisions. Elliptic flow ($v_{2}$) and triangular flow ($v_{3}$) parameters are the second and third order coefficients in the Fourier expansion of azimuthal distributions of the final state particles in the momentum space. $v_{2}$ and $v_{3}$ are sensitive to the equation of the state (EoS) and transport properties, such as shear viscosity to entropy density ratio ($\eta$/s) of the medium produced in the collisions.

Recently, STAR has completed the data taking for Beam Energy Scan phase-II (BES-II) with improved detector conditions and wider rapidity coverage. In this talk, using BES-II data, we will present the high precision measurements of $v_{2}$ and $v_{3}$ of identified hadrons, $\pi^{+}(\pi^{-})$, $K^{+} (K^{-})$, $p(\bar{p})$, $K_{S}^{0}$, $\phi$, $\Lambda(\bar{\Lambda})$, $\Xi^{-}(\bar{\Xi}^{+})$, and $\Omega^{-}(\bar{\Omega}^{+})$ in Au+Au collisions at $\sqrt{s_{NN}}$ = 14.6 and 19.6 GeV. The centrality and rapidity dependence of $v_{n}$ and number of constituent quark (NCQ) scaling will be presented. Finally, the physics implications of our measurements in the context of partonic collectivity will be discussed.

Primary author

Presentation materials