67 citations · 218 across the 12 of their papers we have counts for
14 papers
Analysis of U(1) symmetry-breaking and restoration effects on the scalar-pseudoscalar spectrum
Pedro Costa, M. C. Ruivo, C. A. de Sousa +1
We explore patterns of effective restoration of the chiral U(1) symmetry using an extended three-flavor Nambu-Jona-Lasinio model that incorporates explicitly the axial anomaly…
Restoration of U(1) symmetry and meson spectrum in hot or dense matter
Pedro Costa, M. C. Ruivo, C. A. de Sousa +1
We explore the effects of breaking and restoration of chiral and axial symmetries using an extended three-flavor Nambu-Jona-Lasinio model that incorporates explicitly the axial ano…
Is the U(1) symmetry restored at finite temperature or density?
Pedro Costa, M. C. Ruivo, C. A. de Sousa +1
We investigate the full U(3)U(3) chiral symmetry restoration, at finite temperature and density, on the basis of the three flavor Nambu-Jona-Lasinio model with the anomaly…
Phase transitions and behavior of kaons in hot and dense matter
C. A. de Sousa, Pedro Costa, M. C. Ruivo +1
We study phase transitions and the behavior of kaons in hot and dense matter, giving special attention to the role of strange quarks. At T=0, it is found that the fraction of the s…
Effective restoration of chiral and axial symmetries at finite temperature and density
M. C. Ruivo, Pedro Costa, C. A. de Sousa +1
The effective restoration of chiral and axial symmetries is investigated within the framework of the SU(3) Nambu-Jona-Lasinio model. The topological susceptibility, modeled from la…
Two photon decay of and at finite temperature and density
Pedro Costa, M. C. Ruivo, Yu. L. Kalinovsky
A comparative study of the anomalous decays , at finite temperature and at finite density, is performed in the framework of the three--flavor Nambu--Jona-Lasinio. The…