In the deconfined region of QCD at sufficiently high temperatures or baryon density, the interactions between two static color charges is screened by the medium and this is at the basis of interesting phenomenology, like the dissociation of heavy quark bound states in the Quark-Gluon Plasma. Screening properties have been widely studied in lattice QCD by means of Polyakov loop correlators which, in the deconfined region, allow to probe the properties of the medium and to define gauge-invariant non-perturbative screening masses related to the chromo-electric and chromo-magnetic fields.
In this talk we discuss the extension of electric and magnetic screening masses in the Quark-Gluon Plasma to the case of a finite baryon density. Numerical results are obtained performing lattice QCD simulations at imaginary chemical potential then exploiting analytic continuation, and are presented for $N_f=2+1$ QCD with physical quark masses. As results, we found that both screening masses increase as a function of the baryon density $\mu_B$. In addition, we will also present our determination of the dependence of the static quark free energy on the baryon chemical, showing that it is a decreasing function of $\mu_B$.
|Centralised submission by Collaboration||Presenter name already specified|