Pseudoscalar neutral mesons in hot and dense matter

Abstract

The behavior of neutral pseudoscalar mesons ${\pi }^0,\eta$ and ${\eta }^{\prime }$ in hot and dense matter is investigated, in the framework of the three flavor Nambu-Jona-Lasinio model. Three different scenarios are considered: zero density and finite temperature, zero temperature and finite density in a flavor asymmetric medium with and without strange valence quarks, and finite temperature and density. The behavior of mesons is analyzed in connection with possible signatures of restoration of symmetries. In the high density region and at zero temperature it is found that the mass of the ${\eta }^{\prime }$ increases, the deviation from the mass of the $\eta$ being more pronounced in matter without strange valence quarks.

10 pages, 4 figures included; revised version with one additional figure, some changes in the discussion, to be published in Phys. Lett. B

Cited by in corpus (6)

• Analysis of U${}_A$(1) symmetry-breaking and restoration effects on the scalar-pseudoscalar spectrum
• Pseudoscalars Mesons in Hot, Dense Matter
• Anomalous decay of pion and eta at finite density
• Anomalous decay of pion and eta at finite temperature
• Effective restoration of chiral and axial symmetries at finite temperature and density
• Two photon decay of ${\pi }^0$ and $\eta$ at finite temperature and density