Journal
PHYSICAL REVIEW D
Volume 78, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.114021
Keywords
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Funding
- CONICET
- ANPCyT (Argentina) [PIP 6009, PIP 6084, PICT04-03-25374]
- Polish Ministry of Science and Higher Education [N N202 0953 33]
- Department of Energy
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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 (chi SB) and two-flavor superconducting phases. Additional effects are a shrinking of the chi SB domain in the T - mu 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 mu(8), which is introduced to compensate the color charge density rho(8) induced by a background color gauge mean field phi(3). At low temperatures and large chemical potentials the model exhibits a quarkyonic phase, which gets additional support from the diquark condensation.
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