NRQCD based S- and P-wave bottomonium spectra at finite temperature from $48^3 \times 12$ lattices with $N_f=2+1$ light HISQ flavors

TL;DR

This study investigates the behavior of S- and P-wave bottomonium states at finite temperature using lattice QCD with NRQCD, revealing the survival of certain states up to specific temperatures and assessing discretization effects.

Contribution

It introduces a novel Bayesian method for reconstructing spectral functions and provides new insights into bottomonium state survival at finite temperature.

Findings

$ ext{chi}_{b1}$ survives up to 249 MeV

Discretization effects influence correlation functions

Spectral functions reconstructed with Bayesian approach

Abstract

We study S-wave and P-wave bottomonium spectral functions at non-zero temperature in 2+1 flavor QCD using the NRQCD formulation for bottom quarks. We use a novel Bayesian approach to reconstruct the spectral functions and find that $\chi_{b1}$ survives up to $T=249 {\rm MeV}$. We also study the effect of different temporal discretizations of the NRQCD formalism on the bottomonium correlation functions