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

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71 CLASSICAL AND QUANTUM MECHANICS
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BARYON NUMBER
COSMOLOGICAL MODELS
ELEMENTARY PARTICLES
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PHASE TRANSFORMATIONS
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