Can the phase transition from quark-gluon plasma to hadron-resonance gas affect primordial nucleosynthesis

Journal Article · Sun Apr 15 00:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.41.2384· OSTI ID:6741937

Murugesan, K S; Janhavi, G; Subramanian, P R ^[1]

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1. Department of Nuclear Physics, University of Madras, Madras 600 025, India (IN)

We consider a first-order phase transition from a quark-gluon plasma (QGP) to a hadron-resonance gas (HRG) in the early Universe. We use relativistic quantum statistics for particles in both the phases and include Hagedorn's pressure ensemble correction for the finite size of the hadrons in the HRG phase. In our model we can find the pressure, temperature, and baryon-chemical potential equilibria between the QGP phase and the HRG phase even at very large values of the bag constant {ital B}. The ratio of the baryon-number densities in the QGP and HRG phases at the critical temperature shows that the primordial nucleosynthesis will not be affected significantly if the transition temperature {approx gt}125 MeV. The inclusion of sufficiently light strange quarks in the QGP phase leads to an increase in the baryon density contrast.

• OSTI ID: 6741937
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 41:8; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUARK MATTER
PHASE TRANSFORMATIONS
UNIVERSE
NUCLEOSYNTHESIS
BARYON NUMBER
COSMOLOGICAL MODELS
ENERGY DENSITY
HADRONS
ISOSPIN
QUANTUM CHROMODYNAMICS
QUANTUM MECHANICS
SPIN
ANGULAR MOMENTUM
ELEMENTARY PARTICLES
FIELD THEORIES
MATHEMATICAL MODELS
MATTER
MECHANICS
PARTICLE PROPERTIES
QUANTUM FIELD THEORY
SYNTHESIS
640106* - Astrophysics & Cosmology- Cosmology
645400 - High Energy Physics- Field Theory