Quarkonium at T>0

TL;DR

This paper reviews recent theoretical progress on how quarkonium states, such as charmonia and bottomonia, are affected by finite temperature conditions, highlighting their different sensitivities to deconfinement.

Contribution

It provides a comparative analysis of medium modifications of charmonia and bottomonia at finite temperature using local operator approaches.

Findings

Charmonia are sensitive to the deconfinement transition.

Bottomonia are modified at much higher temperatures.

Theoretical frameworks for medium modifications are discussed.

Abstract

We report recent progress on theoretical investigations of quarkonia at finite temperature. We discuss medium modification of charmonia and bottomonia from a viewpoint of local operators and point out that while charmonia are sensitive to the deconfinement transition bottomonia will be modified at much higher temperatures.