Drag force on heavy diquarks and gauge/string duality

TL;DR

This paper models the drag force on a heavy diquark in a thermal plasma using gauge/string duality, revealing string cusp formation at high speeds and estimating string tension at finite chemical potential.

Contribution

It introduces a gauge/string duality approach to compute drag force on heavy diquarks and explores string configurations and tensions at finite temperature and chemical potential.

Findings

Diquark string configurations develop a cusp at high velocities.

Calculated drag force on diquarks in a thermal plasma.

Estimated spatial string tension at non-zero baryon chemical potential.

Abstract

We use gauge/string duality to model a doubly heavy diquark in a color antitriplet moving in a thermal plasma at temperatures near the critical. With the assumption that there is no relative motion between the constituents, we calculate the drag force on the diquark. At high enough speed we find that diquark string configurations develop a cusp. In addition, we estimate the spatial string tension at non-zero baryon chemical potential, and also briefly discuss an extension to a triply heavy triquark in a color triplet.