Spectral properties of light and charm mesons from $N_f=2+1$ anisotropic lattice QCD

Abstract

We compute temporal correlators and spectral functions for light, open charm and charmonium mesons in the pseudoscalar and vector channel for a range of temperatures below and above the deconfinement transition. The study is carried out using anisotropic lattice QCD with 2+1 dynamical flavours, $a_s=0.123\,$fm and $a_s/a_τ=3.5$. The high-temperature results are benchmarked by comparing them to reconstructed correlators obtained by direct summation of the zero temperature correlator. We use two Bayesian methods to reconstruct the spectral functions: the maximum entropy method and the more recent BR method.

6 pages, 7 figures, based on poster presented at the XIIIth Quark Confinement and the Hadron Spectrum Conference 2018, Maynooth, Ireland