Phase structure of thermal lattice QCD with N{sub f}=2 twisted mass Wilson fermions

Journal Article · Sun Nov 01 04:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.094502· OSTI ID:21325482

Ilgenfritz, E -M ^[1]; Jansen, K ^[2]; Lombardo, M P ^[3]; Mueller-Preussker, M; Petschlies, M ^[1]; Philipsen, O; Zeidlewicz, L ^[4]

---

1. Institut fuer Physik, Humboldt-Universitaet zu Berlin, D-12489 Berlin (Germany)
2. DESY, Zeuthen, D-15738 Zeuthen (Germany)
3. Laboratori Nazionali di Frascati, INFN, I-100044 Frascati (RM) (Italy)
4. Institut fuer Theoretische Physik, Westfaelische Wilhelms-Universitaet Muenster, D-48149 Muenster (Germany)

We present numerical results for the phase diagram of lattice QCD at finite temperature in the formulation with twisted mass Wilson fermions and a tree-level Symanzik-improved gauge action. Our simulations are performed on lattices with temporal extent N{sub {tau}}=8, and lattice coupling {beta} ranging from strong coupling to the scaling domain. Covering a wide range in the space spanned by the lattice coupling {beta} and the hopping and twisted mass parameters {kappa} and {mu}, respectively, we obtain a comprehensive picture of the rich phase structure of the lattice theory. In particular, we verify the existence of an Aoki phase in the strong coupling region and the realization of the Sharpe-Singleton scenario at intermediate couplings. In the weak coupling region we identify the phase boundary for the physical finite temperature phase transition/crossover. Its shape in the three-dimensional parameter space is consistent with Creutz's conjecture of a cone-shaped thermal transition surface.

• OSTI ID: 21325482
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING
FERMIONS
LATTICE FIELD THEORY
MASS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
QUANTUM CHROMODYNAMICS
SCALING
SIMULATION
STRONG-COUPLING MODEL
THREE-DIMENSIONAL CALCULATIONS