In-medium Y(1S,2S,3S) suppression in Pb-Pb collisions at sqrt(s_NN)=5.02 TeV

TL;DR

This paper models the suppression of Y(1S,2S,3S) states in Pb-Pb collisions at 5.02 TeV, fitting parameters to CMS data to understand in-medium effects on quarkonium states.

Contribution

It introduces a model that simultaneously fits suppression data for multiple Y states, determining key parameters like temperature and formation times.

Findings

Model reproduces the sequential suppression pattern observed in CMS data.

Initial temperature and formation times are constrained by chi^2 minimization.

The model captures centrality and transverse momentum dependence of suppression.

Abstract

We present model calculations for the in-medium suppression of the Y(1S,2S,3S) states in sqrt(s_NN)=5.02 TeV Pb-Pb collisions at the Large Hadron Collider in comparison with recent CMS data for all three spin-triplet s-wave states. The model parameters initial central temperature, and formation times for the Y(nS) states are determined in simultaneous chi^2 minimizations with respect to the data, such that the sequential centrality- and transverse-momentum-dependent suppression of the observed states is reproduced.