Cosmological QCD phase transition in steady non-equilibrium dissipative Hořava–Lifshitz early universe

Journal Article · Tue Jul 15 00:00:00 EDT 2014 · Annals of Physics (New York)

DOI:https://doi.org/10.1016/J.AOP.2014.04.012· OSTI ID:22314838

Khodadi, M., E-mail: [e-mail]; Sepangi, H.R., E-mail: [e-mail]

We study the phase transition from quark–gluon plasma to hadrons in the early universe in the context of non-equilibrium thermodynamics. According to the standard model of cosmology, a phase transition associated with chiral symmetry breaking after the electro-weak transition has occurred when the universe was about 1–10 μs old. We focus attention on such a phase transition in the presence of a viscous relativistic cosmological background fluid in the framework of non-detailed balance Hořava–Lifshitz cosmology within an effective model of QCD. We consider a flat Friedmann–Robertson–Walker universe filled with a non-causal and a causal bulk viscous cosmological fluid respectively and investigate the effects of the running coupling constants of Hořava–Lifshitz gravity, λ, on the evolution of the physical quantities relevant to a description of the early universe, namely, the temperature T, scale factor a, deceleration parameter q and dimensionless ratio of the bulk viscosity coefficient to entropy density (ξ)/s . We assume that the bulk viscosity cosmological background fluid obeys the evolution equation of the steady truncated (Eckart) and full version of the Israel–Stewart fluid, respectively. -- Highlights: •In this paper we have studied quark–hadron phase transition in the early universe in the context of the Hořava–Lifshitz model. •We use a flat FRW universe with the bulk viscosity cosmological background fluid obeying the evolution equation of the steady truncated (Eckart) and full version of the Israel–Stewart fluid, respectively.

• OSTI ID: 22314838
• Journal Information: Annals of Physics (New York), Vol. 346, Issue Complete; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-4916
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CHIRAL SYMMETRY
COSMOLOGY
COUPLING CONSTANTS
ENTROPY
EQUILIBRIUM
EVOLUTION
GRAVITATION
HADRONS
INFLATIONARY UNIVERSE
PHASE TRANSFORMATIONS
QUANTUM CHROMODYNAMICS
QUARK MATTER
QUARKS
RELATIVISTIC RANGE
STANDARD MODEL
SYMMETRY BREAKING
THERMODYNAMICS
UNIVERSE
VISCOSITY