2016/10/31 by Tomáš Brauner, Tomas Brauner, Xu-Guang Huang · 19 citations
Physics and Astronomy · #Condensation #High-Energy Particle Collisions Research #Isospin #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Rho meson #Sigma #Superfluidity #Thermodynamics #Vector meson #hep-ph #hep-th #nucl-th
paper · pdf · doi:10.1103/physrevd.94.094003
published in Physical review. D/Physical review. D. 94(9) (American Physical Society) · 12 pages, 4 figures; v2: added references, matches published version
openalex publication_date 2016/11/03 · arxiv created 2016/11/05 · arxiv updated 2016/11/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.