Abstract

Quarkonia are most important probes of the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. The Compact Muon Solenoid (CMS) detector is well suited to measure quarkonia via their decays to dimuon channel. This writeup summarizes quarkonium measurements in pp and PbPb collisions by CMS detector at \(\sqrt{s_{NN}} = 2.76~\mathrm {TeV}\) and \(\sqrt{s_{NN}} = 5.02~\mathrm {TeV}\).

Highlights

  • The main goals of heavy-ion experiments is to validate the existence and study the properties of the quark-gluon plasma (QGP)

  • Quarkonia are most important probes of the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution

  • The QGP is a state of deconfined quarks and gluons predicted by quantum chromodynamics (QCD) studies to exists at high temperatures and/or high energy density

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Summary

Introduction

The main goals of heavy-ion experiments is to validate the existence and study the properties of the quark-gluon plasma (QGP). The QGP is a state of deconfined quarks and gluons predicted by quantum chromodynamics (QCD) studies to exists at high temperatures and/or high energy density. One of the most striking expected signatures of QGP formation is the suppression of quarkonium states. The yields of both of the charmonium (J/ψ, ψ(2S), χc, etc.) and the bottomonium (Υ (1S, 2S, 3S), χb, etc.) families are expected to suppress in heavy ion collisions. SNN = 2.76 TeV, a wealth of quarkonium results have become available [4, 5]. Some of these results are presented in this writeup and their significance is discussed. The latest results from the high statistics 5.02 TeV PbPb data collected in 2015 are given in the writeup

CMS detector at LHC
Quarkonium measurement with CMS detector at LHC
Summary

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