Vector screening masses in the quark-gluon plasma and their physical significance

TL;DR

This paper investigates vector screening masses in the quark-gluon plasma through perturbative calculations and lattice QCD simulations, revealing that non-static modes can be treated perturbatively and discussing their physical significance.

Contribution

It combines perturbative and lattice QCD methods to analyze vector screening masses and their couplings, providing new insights into their physical interpretation.

Findings

Non-static Matsubara modes are treatable perturbatively.

Consistent results between perturbative and lattice approaches.

Screening masses have significant physical implications.

Abstract

Static and non-static thermal screening states that couple to the conserved vector current are investigated in the high-temperature phase of QCD. Their masses and couplings to the current are determined at weak coupling, as well as using two-flavor lattice QCD simulations. A consistent picture emerges from the comparison, providing evidence that non-static Matsubara modes can indeed be treated perturbatively. We elaborate on the physical significance of the screening masses.