2016/11/03 by Tomáš Brauner, Xu-Guang Huang · 3 citations
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies
paper · doi:10.1103/physrevd.94.094003
We revisit the suggestion that charged \ensuremathρ-mesons undergo Bose-Einstein condensation in isospin-rich nuclear matter. Using a simple version of the Nambu--Jona-Lasinio (NJL) model, we conclude that \ensuremathρ-meson condensation is either avoided or postponed to isospin chemical potentials much higher than the \ensuremathρ-meson mass as a consequence of the repulsive interaction with the preformed pion condensate. In order to support our numerical results, we work out a linear sigma model for pions and \ensuremathρ-mesons, showing that the two models lead to similar patterns of medium dependence of meson masses. As a byproduct, we analyze in detail the mapping between the NJL model and the linear sigma model, focusing on conditions that must be satisfied for a quantitative agreement between the models.