Speaker
Description
Quarkonia, the bound states of heavy quark-antiquark pairs, have proven to be crucial probes for studying quark-gluon plasma (QGP). The color screening properties of the QGP weaken the interaction between quark-antiquark pairs, leading to the suppression of quarkonia yields within the QGP. We will present results on the fate of quarkonia bound states in the QGP by performing spectral reconstruction from lattice correlators in 2+1 flavor QCD at temperatures of 1.2 Tc, 1.4 Tc, and 1.62 Tc. The spectral function is reconstructed by combining the perturbative vacuum part, which is valid at large energy, with the one obtained from the thermal potential near the threshold. The spectral function near the threshold region has been obtained by using a non-perturbative thermal potential.
We observe that this spectral function, obtained in this way, can effectively describe the lattice QCD correlator in the pseudoscalar channel; however, for the vector channel, one needs to include an additional transport peak. Our findings indicate that the thermal interaction shifts the bound state mass and results in a significantly larger thermal width. In the charmonium system, the width is much larger than in the bottomonium system.
