Polyakov-loop suppression of colored states in a quark-meson-diquark plasma
arXiv:1412.1040 · doi:10.1103/PhysRevD.91.125040
Abstract
A quark-meson-diquark plasma is considered within the PNJL model for dynamical chiral symmetry breaking and restoration in quark matter. Based on a generalized Beth-Uhlenbeck approach to mesons and diquarks we present the thermodynamics of this system including the Mott dissociation of mesons and diquarks at finite temperature. A striking result is the suppression of the diquark abundance below the chiral restoration temperature by the coupling to the Polyakov loop, because of their color degree of freedom. This is understood in close analogy to the suppression of quark distributions by the same mechanism. Mesons as color singlets are unaffected by the Polyakov-loop suppression. At temperatures above the chiral restoration mesons and diquarks are both suppressed due to the Mott effect, whereby the positive resonance contribution to the pressure is largely compensated by the negative scattering contribution in accordance with the Levinson theorem.
9 pages, 5 figures, references added, discussion of Beth-Uhlenbeck approach and Levinson theorem extended; version to appear in Phys. Rev. D
References in corpus (9)
- The equation of state in (2+1)-flavor QCD
- The QCD equation of state with dynamical quarks
- The Phase Structure of the Polyakov--Quark-Meson Model
- Susceptibilities and the Phase Structure of a Chiral Model with Polyakov Loops
- Mesonic correlation functions at finite temperature and density in the Nambu-Jona-Lasinio model with a Polyakov loop
- The chiral and deconfinement crossover transitions: PNJL model beyond mean field
- Effects of mesonic correlations in the QCD phase transition
- Width of the QCD transition in a Polyakov-loop DSE model
- Thermodynamic instabilities in dynamical quark models with complex conjugate mass poles