Finite temperature hadronic spectral properties

TL;DR

This paper investigates how hadronic spectral properties, especially of bottomonia and charm hadrons, change with temperature using lattice QCD, revealing stability of some particles beyond the pseudo-critical temperature.

Contribution

It presents new lattice NRQCD simulations that improve control over systematic errors in studying finite temperature hadronic spectral properties.

Findings

Bottomonia spectral properties at finite temperature are determined.

Some charm hadron species remain stable beyond the pseudo-critical temperature.

Temperature effects influence hadron masses even within the confining phase.

Abstract

The FASTSUM collaboration has a long-standing project examining hadronic properties using anisotropic lattice QCD. We determine the spectral properties of bottomonia at finite temperature using lattice NRQCD and describe how our newer simulations improve our control over systematic errors. Motivated by these efforts, the temperature dependence of charm hadron masses is determined where it is found that temperature effects can extend into the confining phase and that some species remain stable deep past the pseudo-critical temperature.