QCD thermodynamics with two flavors of Wilson quarks at N sub t =6

Journal Article · Sun Nov 15 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.4741· OSTI ID:7200504

Bernard, C; Ogilvie, M C ^[1]; DeGrand, T A ^[2]; DeTar, C ^[3]; Gottlieb, S; Krasnitz, A ^[4]; Sugar, R L ^[5]; Toussaint, D ^[6]

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1. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)
2. Department of Physics, University of Colorado, Boulder, Colorado 80309 (United States)
3. Department of Physics, University of Utah, Salt Lake City, Utah 84112 (United States)
4. Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
5. Department of Physics, University of California, Santa Barbara, California 93106-9530 (United States)
6. Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)

We report on a study of hadron thermodynamics with two flavors of Wilson quarks on 12{sup 3}{times}6 lattices. We have studied the crossover between the high- and low-temperature regimes for three values of the hopping parameter, {kappa}=0.16, 0.17, and 0.18. At each of these values of {kappa} we have carried out spectrum calculations on 12{sup 3}{times}24 lattices for two values of the gauge coupling in the vicinity of the crossover in order to set an energy scale for our thermodynamics calculations and to determine the critical value of the gauge coupling for which the pion and quark masses vanish. For {kappa}=0.17 and 0.18 we find coexistence between the high- and low-temperature regimes over 1000 simulation time units indicating either that the equilibration time is extremely long or that there is a possibility of a first-order phase transition. The pion mass is large at the crossover values of the gauge coupling, but the crossover curve has moved closer to the critical curve along which the pion and quark masses vanish, than it was on lattices with four time slices ({ital N}{sub {ital t}}=4). In addition, values of the dimensionless quantity {ital T}{sub {ital c}}/{ital m}{sub {rho}} are in closer agreement with those for staggered quarks than was the case at {ital N}{sub {ital t}}=4.

• DOE Contract Number: FG03-90ER40546; AC02-78ER04915
• OSTI ID: 7200504
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 46:10; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LATTICE FIELD THEORY
QUANTUM CHROMODYNAMICS
THERMODYNAMIC PROPERTIES
CHIRAL SYMMETRY
COUPLING
FLAVOR MODEL
GAUGE INVARIANCE
GAUSSIAN PROCESSES
HADRONS
HAMILTONIANS
MASS
MONTE CARLO METHOD
PHASE TRANSFORMATIONS
QUARKS
SIMULATION
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
PARTICLE MODELS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUANTUM OPERATORS
QUARK MODEL
SYMMETRY
662110* - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)
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662230 - Quantum Chromodynamics- (1992-)