Spectrum of QCD at Finite Isospin Density

TL;DR

This paper explores the phase diagram of QCD at finite isospin density, identifying a pion condensation phase and analyzing the spectrum of particles, revealing that the Polyakov loop remains unaffected by density in the studied regime.

Contribution

It provides new measurements of meson and nucleon masses at finite isospin density and examines the phase structure using staggered quarks, extending previous studies.

Findings

Identification of a pion condensation phase at high chemical potential

Measurement of pion, rho, and nucleon masses inside and outside the condensation phase

Polyakov loop independence from density in the studied regime

Abstract

We study the phase diagram of QCD at finite isospin density using two flavors of staggered quarks. We investigate the low temperature region of the phase diagram where we find a pion condensation phase at high chemical potential. We started a basic analysis of the spectrum at finite isospin density. In particular, we measured pion, rho and nucleon masses inside and outside of the pion condensation phase. In agreement with previous studies in two-color QCD at finite baryon density we find that the Polyakov loop does not depend on the density in the staggered formulation.