Thermal width of heavy quarkonia from an AdS/QCD model

TL;DR

This paper estimates the thermal width of heavy quarkonia in a strongly coupled plasma using an AdS/QCD holographic model, linking quantum string fluctuations near the horizon to quark potential decay.

Contribution

It introduces a holographic approach with a soft wall background to compute the thermal width, incorporating an infrared mass scale for more realistic modeling.

Findings

Results align with previous models using mass scale averaging.

Imaginary part of the quark potential derived from string fluctuations.

Consistent with prior analyses of quarkonium thermal decay.

Abstract

We estimate the thermal width of a heavy quark anti-quark pair inside a strongly coupled plasma using a holographic AdS/QCD model. The imaginary part of the quark potential that produces the thermal width appears in the gravity dual from quantum fluctuations of the string world sheet in the vicinity of the horizon. The results, obtained using a soft wall background that involves an infrared mass scale, are consistent with previous analisys where the mass scale was introduced by averaging over quark anti-quark states.