Finite temperature effects on cosmological baryon diffusion and inhomogeneous big-bang nucleosynthesis

Journal Article · Tue Dec 01 00:00:00 EST 1998 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.58.123002· OSTI ID:670263

Suh, I; Mathews, G J ^[1]

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1. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

We have studied finite temperature corrections to the baryon transport cross sections and diffusion coefficients. These corrections are based upon our recently computed renormalized electron mass and modified state density due to the background thermal bath in the early universe. It is found that the optimum nucleosynthesis yields computed using our diffusion coefficients shift to longer distance scales by a factor of about 3. We also find that the primordial {sup 4}He abundance decreases by {Delta}Y{sub p}{approx_equal}0.01 while {ital D} and {sup 7}Li increase. The effects of these results on constraints from primordial nucleosynthesis are discussed. In particular, we find that a large baryonic contribution to the closure density ({Omega}{sub b}h{sub 50}{sup 2}{approx_lt}0.4) may be allowed in inhomogeneous models corrected for finite temperature. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 670263
• Journal Information: Physical Review, D, Vol. 58, Issue 12; Other Information: PBD: Dec 1998
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COSMOLOGY
NUCLEOSYNTHESIS
BARYON REACTIONS
DIFFUSION
TRANSPORT THEORY
HELIUM 4
LITHIUM 7
DEUTERIUM
TEMPERATURE DEPENDENCE