The impact of fluctuating initial conditions on bottomonium suppression in 5.02 TeV heavy-ion collisions

TL;DR

This study investigates how fluctuating initial conditions affect bottomonium suppression and elliptic flow in 5.02 TeV heavy-ion collisions, using advanced quantum and hydrodynamical modeling.

Contribution

It introduces a detailed quantum wave packet evolution approach within a hydrodynamical background to assess initial condition fluctuations on bottomonium observables.

Findings

Fluctuating initial conditions have a small impact on suppression results.

The Upsilon(1S) elliptic flow is measured as v_2[1S] = 0.005 +/- 0.002 +/- 0.001.

Results suggest initial condition fluctuations minimally influence bottomonium suppression and flow.

Abstract

We compute bottomonium suppression and elliptic flow within the pNRQCD effective field theory using an open quantum systems approach. For the hydrodynamical background, we use 2+1D MUSIC second-order viscous hydrodynamics with IP-Glasma initial conditions and evolve bottom/antibottom quantum wave packets in real time in these backgrounds. We find that the impact of fluctuating initial conditions is small when compared to results obtained using smooth initial conditions. Including the effect of fluctuating initial conditions, we find that the Upsilon(1S) integrated elliptic flow is v_2[1S] = 0.005 +/- 0.002 +/- 0.001, with the first and second variations corresponding to statistical and systematic theoretical uncertainties, respectively.