Color neutrality effects in the phase diagram of the PNJL model

Details Color neutrality effects in the phase diagram of the PNJL model Color neutrality effects in the phase diagram of the PNJL model

2008-07-10

arxiv.org/abs/0807.1660v2

Phys.Rev.D78:114021,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 4 figures, figures added, minor text modifications

Scientific paper

10.1103/PhysRevD.78.114021

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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