Quarkonium in a weakly-coupled quark-gluon plasma

TL;DR

This paper presents a calculation of heavy quarkonium mass and decay width in a weakly-coupled quark-gluon plasma, considering a specific temperature and screening mass hierarchy, up to order m alpha_s^5, relevant for collider experiments.

Contribution

It provides a detailed theoretical calculation of quarkonium properties in a specific plasma regime, extending previous models to higher order accuracy.

Findings

Calculated quarkonium mass and decay width up to order m alpha_s^5.

Results applicable to understanding Y(1S) behavior in collider plasmas.

Clarified the effects of temperature and screening mass hierarchy on quarkonium states.

Abstract

We report about a recent calculation of the heavy quarkonium mass and decay width in a quark-gluon plasma, whose temperature T and screening mass m_D satisfy the hierarchy m alpha_s >> pi T >> m alpha_s^2 >> m_D, m being the heavy-quark mass, up to order m alpha_s^5. The calculation may be relevant to understand the behavior of the Y(1S) in a quark-gluon plasma at present-day colliders.