INVESTIGADORES
GOMEZ DUMM Daniel Alberto
artículos
Título:
Color neutrality effects in the phase diagram of the Polyakov-Nambu-Jona-Lasinio model
Autor/es:
DANIEL GOMEZ DUMM; DAVID B. BLASCHKE; ANA G. GRUNFELD; NORBERTO N. SCOCCOLA
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
American Physical Society
Referencias:
Lugar: Ridge, New York; Año: 2008 vol. 78 p. 114021 - 114021
ISSN:
0556-2821
Resumen:
The phase diagram of a two-flavor Polyakov-loop Nambu?Jona-Lasinio model is analyzed imposing the constraint of color charge neutrality. The main effect of this constraint is a coexistence of the chiral symmetry breaking (cSB) and two-flavor superconducting phases. Additional effects are a shrinking of the cSB domain in the T ? m plane and a shift of the end point to lower temperatures, but their quantitative importance is shadowed by the intrinsic uncertainties of the model. The effects can be understood in view of the presence of a nonvanishing color chemical potential m8, which is introduced to compensate the color charge density r8 induced by a background color gauge mean field m3. At low temperatures and large chemical potentials the model exhibits a quarkyonic phase, which gets additional support from the diquark condensation.