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arXiv · 0807.1660

Color neutrality effects in the phase diagram of the PNJL model

D. Gomez Dumm·D. B. Blaschke·A. G. Grunfeld·N. N. Scoccola
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Abstract

The phase diagram of a two-flavor Polyakov loop Nambu-Jona-Lasinio model is analyzed imposing the constraint of color charge neutrality. Main effects of this constraint are a shrinking of the chiral symmetry breaking (chiSB) domain in the T-mu plane, a shift of the critical point to lower temperatures and a coexistence of chiSB and two-flavor superconducting phases. The effects can be understood in view of the presence of a nonvanishing color chemical potential mu_8, which is necessary to compensate the color charge density rho_8 induced by the nonvanishing Polyakov-loop mean field phi_3.

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D. Gomez Dumm, D. B. Blaschke, A. G. Grunfeld, N. N. Scoccola. 2008-12-20. Color neutrality effects in the phase diagram of the PNJL model. https://doi.org/10.1103/physrevd.78.114021

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