Fireball tomography from bottomonia elliptic flow in relativistic heavy-ion collisions

TL;DR

This paper investigates bottomonia elliptic flow in heavy-ion collisions to extract tomographic information about the quark-gluon plasma using temperature-dependent decay widths and hydrodynamic modeling.

Contribution

It introduces a method to use bottomonia elliptic flow as a tomographic probe of the QGP, incorporating temperature-dependent decay widths and anisotropic hydrodynamics.

Findings

Transverse momentum dependence of bottomonia elliptic flow matches experimental data.

The study provides insights into the space-time evolution of the QGP fireball.

Results support the use of bottomonia as a tomographic tool for QGP.

Abstract

We calculate the elliptic flow of bottomonia produced in Pb$\,+\,$Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV. We consider temperature-dependent decay widths for the anisotropic escape of various bottomonium states and observe that the transverse momentum dependence of bottomonia elliptic flow provides a tomographic information about the QGP fireball at different stages of its evolution. For the space-time evolution of the fireball, we employ simulation results from the 3+1D quasiparticle anisotropic hydrodynamic model. We find that our results for transverse momentum dependence of bottomonia elliptic flow are in reasonable agreement with experimental results from the ALICE and CMS collaborations.