Thermal Upsilon(1s) and chi_b1 suppression in sqrt(s_NN)=2.76 TeV Pb-Pb collisions at the LHC

TL;DR

This paper calculates the thermal suppression of Upsilon(1s) and chi_b1 states in high-energy Pb-Pb collisions at the LHC, providing estimates of their suppression patterns and comparing with experimental data.

Contribution

It introduces a new computation of thermal suppression for Upsilon(1s) and chi_b1 states, refining predictions of their suppression in heavy-ion collisions.

Findings

Less suppression of chi_b1 than traditionally assumed

Total Upsilon(1s) suppression aligns with CMS data

Suppression varies with centrality, rapidity, and transverse momentum

Abstract

I compute the thermal suppression of the Upsilon(1s) and chi_b1 states in sqrt(s_NN)=2.76 TeV Pb-Pb collisions. Using the suppression of each of these states I estimate the total R_AA for the Upsilon(1s) state as a function of centrality, rapidity, and transverse momentum. I find less suppression of the chi_b1 state than would be traditionally assumed; however, my final results for the total Upsilon(1s) suppression are in good agreement with recent preliminary CMS data.