Spectral functions from lattice QCD at finite temperature

Abstract

An investigation of the bottonionium spectrum above and below the QCD deconfinement crossover temperature, Tc, was performed using a non-relativistic treatment of the heavy quark on anisotropic lattices with Nf = 2 + 1 flavours of Wilson-clover fermion and a Symanzik-improved gauge action. The spectral functions were reconstructed from the Euclidean correlators using two Bayesian methods to tackle the ill-posed inverse problem, known as the Maximum Entropy Method (MEM) and the Bayesian Reconstruction (BR) method.