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The phase diagram of a two-flavor Polyakov loop Nambu-Jona-Lasinio model isanalyzed imposing the constraint of color charge neutrality. Main effects ofthis constraint are a shrinking of the chiral symmetry breaking (chiSB) domainin the T-mu plane, a shift of the critical point to lower temperatures and acoexistence of chiSB and two-flavor superconducting phases. The effects can beunderstood in view of the presence of a nonvanishing color chemical potentialmu_8, which is necessary to compensate the color charge density rho_8 inducedby the nonvanishing Polyakov-loop mean field phi_3.

Color neutrality effects in the phase diagram of the PNJL model