Recent thermodynamic results from lattice QCD analyzed within a quasiparticle model

Journal Article · Tue Nov 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.094004· OSTI ID:21608010

Plumari, Salvatore; Greco, Vincenzo ^[1]; Alberico, Wanda M; Ratti, Claudia ^[2]; INFN, Sezione di Torino ^[3]

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1. Department of Physics and Astronomy, University of Catania, Via S. Sofia 64, I-95125 Catania (Italy)
2. Dipartimento di Fisica Teorica, Universita degli Studi di Torino via P. Giuria 1, I-10125 Torino (Italy)
3. Italy

The thermodynamic behavior of QCD matter at high temperature is currently studied by lattice QCD theory. The main features are the fast rise of the energy density {epsilon} around the critical temperature T{sub c} and the large trace anomaly of the energy momentum tensor <{Theta}{sub {mu}}{sup {mu}}>={epsilon}-3P, which hints at a strongly interacting system. Such features can be accounted for by employing a massive quasiparticle model with a temperature-dependent bag constant. Recent lattice QCD calculations with physical quark masses by the Wuppertal-Budapest group show a slower increase of {epsilon} and a smaller <{Theta}{sub {mu}}{sup {mu}}> peak with respect to previous results from the HotQCD Collaboration. We investigate the implications of such differences from the point of view of a quasiparticle model, also discussing light and strange quark number susceptibilities. Furthermore, we predict the impact of these discrepancies on the temperature dependence of the transport properties of matter, like the shear and bulk viscosities.

• OSTI ID: 21608010
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 9; Other Information: DOI: 10.1103/PhysRevD.84.094004; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CRITICAL TEMPERATURE
ENERGY DENSITY
ENERGY-MOMENTUM TENSOR
LATTICE FIELD THEORY
MASS
QUANTUM CHROMODYNAMICS
QUASIPARTICLE-PHONON MODEL
S QUARKS
TEMPERATURE DEPENDENCE
VISCOSITY
CONSTRUCTIVE FIELD THEORY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
MATHEMATICAL MODELS
NUCLEAR MODELS
PHYSICAL PROPERTIES
QUANTUM FIELD THEORY
QUARKS
STRANGE PARTICLES
TENSORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE