Grand unified reactions and dissipation in anisotropic cosmologies

Details Grand unified reactions and dissipation in anisotropic cosmologies Grand unified reactions and dissipation in anisotropic cosmologies

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...263..501r&link_type=abstract

Astrophysical Journal, Part 1, vol. 263, Dec. 15, 1982, p. 501-507. Research supported by the Science and Engineering Research

Astronomy and Astrophysics

Astrophysics

6

Anisotropy, Cosmology, Elementary Particle Interactions, Nuclear Fusion, Unified Field Theory, Astronomical Models, Baryons, Entropy, Mean Free Path, Particle Collisions

Scientific paper

The evolution of anisotropy in universes containing particles interacting by the Grand Unified Theory cross section behavior shear is proportional to the inverse square of the center of mass energy, in the interval after baryosynthesis is considered. It is found that efficient damping of anisotropy is not a generic feature of these cosmologies, so no limit can be put on their very early anisotropy by demanding that the entropy per baryon be limited to observed values. This is demonstrated by an analytical viscosity approximation, and numerical calculations based on a collision time model.

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