Recent Results from the FASTSUM Collaboration

TL;DR

The FASTSUM Collaboration's recent work advances thermal QCD studies through spectral function analysis, hadron spectrum calculations, and interquark potential determinations using anisotropic ensembles with varying pion masses.

Contribution

This paper presents new results on thermal hadron spectra, spectral functions, and interquark potentials in thermal QCD using innovative lattice ensembles and analysis methods.

Findings

Thermal hadron spectra for open charm mesons and baryons at pion mass 239 MeV.

Spectral functions of bottomonium obtained via Backus Gilbert method.

Interquark potential determined for bottomonium at pion mass 384 MeV.

Abstract

The FASTSUM Collaboration has developed a comprehensive research programme in thermal QCD using 2+1 flavour, anisotropic ensembles. In this talk, we summarise some of our recent results including thermal hadron spectrum calculations using our ``Generation 2L'' ensembles which have pion masses of 239(1) MeV. These include open charm mesons and charm baryons. We also summarise our work using the Backus Gilbert approach to determining the spectral function of the NRQCD bottomonium system. Finally, we review our determination of the interquark potential in the same system, but using our ``Generation 2'' ensembles which have heavier pion masses of 384(4) MeV.