Nonlocal Ployakov-Nambu-Jona-Lasinio model and imaginary chemical potential
With the aim of setting constraints for the modeling of the QCD phase diagram, the phase structure of the two-flavor Polyakov-loop-extended Nambu and Jona-Lasinio (PNJL) model is investigated in the range of imaginary chemical potentials ({mu}{sub I}) and compared with available N{sub f} = 2 lattice QCD results. The calculations are performed using the advanced nonlocal version of the PNJL model with the inclusion of vector-type quasiparticle interactions between quarks, and with wave-function-renormalization corrections. It is demonstrated that the nonlocal PNJL model reproduces important features of QCD at finite {mu}{sub I}, such as the Roberge-Weiss (RW) periodicity and the RW transition. Chiral and deconfinement transition temperatures for N{sub f} = 2 turn out to coincide both at zero chemical potential and at finite {mu}{sub I}. Detailed studies are performed concerning the RW endpoint and its neighborhood where a first-order transition occurs.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
- Sponsoring Organization:
- RIKEN
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1043349
- Report Number(s):
- BNL-96600-2011-JA; TRN: US1203107
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 84, Issue 5; ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- English
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