Directed flow of light flavor hadrons for Au+Au collisions at $\sqrt{S_{NN}}=$ 7.7-200 GeV

TL;DR

This study models the directed flow of light-flavor hadrons in Au+Au collisions across a range of energies using hydrodynamics and Glauber initial conditions, successfully matching experimental data.

Contribution

It introduces a calibrated hydrodynamic model with Glauber initial conditions to accurately describe the rapidity dependence of directed flow in heavy-ion collisions.

Findings

Successfully reproduces the rapidity dependence of $v_1$

Captures the $v_1$ splitting between baryons and anti-baryons

Describes the beam energy dependence of directed flow

Abstract

We have studied the directed flow of light-flavor hadrons for Au + Au collisions at $\sqrt{S_{NN}}=$ 7.7 - 200 GeV. The initial condition is taken from a suitable Glauber model which is further evolved within the framework of relativistic hydrodynamics. Model calculations of the rapidity-odd directed flow ($v_1$) of identified light-flavor hadrons are compared with the available experimental data after suitably calibrating the initial condition to describe the rapidity dependence of charged particle multiplicity and net-proton yield. For reasonable choice of the initial condition, we are able to describe the measured rapidity and beam energy dependence of identified hadron $v_{1}$ including the observed $v_1$ splitting between baryons and anti-baryons.