# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Screening masses and static quark free energy at non-zero baryon density from lattice QCD

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Phase diagram and search for the critical point

### Speaker

Andrea Rucci (University of Pisa and INFN)

### Description

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 Theory

### Primary authors

Andrea Rucci (University of Pisa and INFN) CLAUDIO BONATI (University of Pisa) Francesco Negro (INFN - Sezione di Pisa) Massimo D'Elia (University of Pisa) Dr Francesco Sanfilippo (INFN - Sezione di Roma 3) Michele Mesiti (University of Pisa) Mr Michele Andreoli (University of Pisa)

### Presentation Materials

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