Aspects of the phase diagram in (P)NJL-like models |
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Authors: | M Buballa AG Grunfeld AE Radzhabov |
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Institution: | a Institut für Kernphysik, Technische Universität Darmstadt, Germany b CONICET, Buenos Aires, Argentina c Physics Department, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina d Institute for System Dynamics and Control Theory, Irkutsk, Russia |
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Abstract: | We discuss three applications of NJL- and PNJL-like models to assess aspects of the QCD phase diagram: First, we study the effect of mesonic correlations on the pressure below and above the finite temperature phase transition within a non-local PNJL model beyond the mean-field approximation. Second, we reconstruct the phase boundary of an NJL model from a Taylor expansion of the chiral susceptibility about μ=0 and compare the result with the exact phase boundary. Finally, we demonstrate the realization of the “non-standard scenario” for the critical surface in a three-flavor PNJL model with a μ-dependent determinant interaction. |
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Keywords: | QCD phase diagram Nambu Jona Lasinio model Critical endpoint |
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