The effect of initial fluctuations on bottomonia suppression in relativistic heavy-ion collisions

TL;DR

This study investigates how initial fluctuations in quark-gluon plasma affect the suppression of bottomonium states in relativistic heavy-ion collisions, revealing differential impacts on ground and excited states.

Contribution

It introduces a detailed analysis of initial fluctuation effects on bottomonia suppression using hydrodynamics and QCD calculations, highlighting state-dependent differences.

Findings

Initial fluctuations minimally affect 1S bottomonium yield.

Excited bottomonia suppression varies with initial fluctuations.

Both smooth and fluctuating initial conditions can explain CMS data.

Abstract

Using the screened Cornell potential and the next-to-leading order perturbative QCD to determine, respectively, the properties of bottomonia and their dissociation cross sections in a quark-gluon plasma, we study in a 2+1 ideal hydrodynamics the effect of initial fluctuations on bottomonia production in relativistic heavy-ion collisions. We find that while initial fluctuations hardly affect the yield of the 1S ground state bottomonium, their effect on that of excited bottomonium states is not small. Compared to the case with smooth initial conditions, the survival probability of excited bottomonia is reduced at low transverse momentum and increased at high transverse momentum. The observed suppression of the excited bottomonia relative to the ground state bottomonium by the Compact Muon Solenoid (CMS) collaborations at an average transverse momentum can, however, be described at present with both smooth and fluctuating initial conditions.