# Initial Stages 2021

Jan 10 – 15, 2021
Weizmann Institute of Science
Asia/Jerusalem timezone
See you at IS2023 in Copenhagen in June 2023

## A collision geometry-based 3D initial condition for relativistic heavy-ion collisions

Jan 11, 2021, 7:40 PM
1h 30m
Patio (vDLCC)

### Patio

#### vDLCC

bullet talk (poster) The initial stages of heavy-ion collisions

### Speaker

Mrs Sahr Alzhrani (Wayne State University)

### Description

We present a way to construct 3D initial conditions for relativistic heavy-ion collisions based on the Glauber collision geometry [1]. Local energy and momentum conservation conditions are imposed to set non-trivial constraints on our longitudinal profiles’ parameterizations for the system’s initial energy density and flow velocity. We show that the $\sqrt{T_A T_B}$ scaling of initial energy density profiles results from the longitudinal momentum conservation. After calibrating parameters with charged hadron rapidity distributions in central Au+Au collisions, we test model predictions for particle rapidity distributions in d+Au and peripheral Au+Au collisions in the Beam Energy Scan (BES) program at Relativistic Heavy-Ion Collider (RHIC). Simulations and comparisons with measurements are also made for Pb+Pb collisions at Super Proton Synchrotron (SPS) energies. We demonstrate that elliptic flow measurements in heavy-ion collisions at $\sqrt{s} \sim 10$ GeV can set strong constraints on the dependence of Quark-Gluon Plasma shear viscosity on temperature and net baryon chemical potential. The effects of event-by-event fluctuations on flow observables will be quantified in this approach.

[1] C. Shen and S. Alzhrani, “A collision geometry-based 3D initial condition for relativistic heavy-ion collisions,” Phys. Rev. C 102, 014909 (2020)

### Primary authors

Dr Chun Shen (Wayne State University) Mrs Sahr Alzhrani (Wayne State University)