Study of charm and beauty in QGP from unquenched lattice QCD

TL;DR

This study uses unquenched lattice QCD to analyze charmonium and bottomonium spectral functions in the quark-gluon plasma, providing new insights into heavy quark behavior at finite temperature.

Contribution

First-time reconstruction of charmonium and bottomonium spectral functions in full QCD using a mixed-action approach and advanced spectral models.

Findings

Preliminary spectral functions for charmonium and bottomonium in full QCD.

Use of models based on perturbative spectral functions for reconstruction.

Tuning of quark masses to experimental values.

Abstract

We present charmonium and bottomonium correlators and corresponding reconstructed spectral functions from full QCD calculations in the pseudoscalar channel. Correlators are obtained using a mixed-action approach, clover-improved Wilson valence quarks on gauge field configurations generated with $N_f=2+1$ HISQ sea quarks, with physical strange quark masses and light quark masses corresponding to $m_\pi=315$ MeV. The charm and bottom quark masses are tuned to reproduce the experimental mass spectrum of the spin averaged quarkonium vector mesons from the particle data group. For the spectral reconstruction, we use models based on perturbative spectral functions from different frequency regions like resummed thermal contributions around the threshold from pNRQCD and vacuum contributions well above the threshold. We show preliminary results of the reconstructed spectral function obtained for the first time in our study for full QCD.