Nonlocal Ployakov-Nambu-Jona-Lasinio model and imaginary chemical potential

Journal Article · Wed Sep 21 04:00:00 EDT 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.84.056010· OSTI ID:1043349

Kashiwa, K; Hell, T; Weise, W

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 Laboratory (BNL) Riken BNL Research Center
• Sponsoring Organization: RIKEN
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1043349
• Report Number(s): BNL--96600-2011-JA
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Issue: 5 Vol. 84; ISSN 1550-7998
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
PERIODICITY
PHASE DIAGRAMS
QUANTUM CHROMODYNAMICS
QUARKS
SIMULATION
TRANSITION TEMPERATURE
nonlocal polyakov nambu jona lasinio
riken bnl research center