Light quark energy loss in a soft-wall AdS/QCD model

TL;DR

This paper studies how light quarks lose energy in a holographic QCD model with broken conformal symmetry, showing that chemical potential and confinement increase energy loss, consistent with prior drag force and jet quenching results.

Contribution

It introduces a holographic QCD model with a dilaton background to analyze light quark energy loss using two different string methods, confirming consistent results.

Findings

Chemical potential increases energy loss.

Confining scale enhances quark energy loss.

Both string methods yield identical results.

Abstract

We investigate the energy loss of light quarks in a holographic QCD model with conformal invariance broken by a background dilaton. We perform the analysis within falling string and shooting string, respectively. It turns out that the two methods give the same result: the presence of chemical potential and confining scale tends to enhance the energy loss, in accord with previous findings of drag force and jet quenching parameter.