Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..479a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 189, Nov. 1979, p. 479-482.
Astronomy and Astrophysics
Astronomy
2
Baryons, Cosmology, Universe, Antimatter, Chaos, Entropy, Particle Energy
Scientific paper
The argument of Barrow and Matzner (1977) that the finite value of the entropy per baryon in the universe today is not compatible with an arbitrarily high amount of initial chaos is considered. This conclusion is shown to depend crucially on the implicit assumption that the baryon number in a comoving volume is conserved during the expansion of the universe. It is suggested that some matter-antimatter symmetry breaking in the hot primordial radiation would render the finite value of the entropy per baryon in the universe today very compatible with an arbitrarily high amount of chaos at the time of dissipation of initial anisotropy by particle-antiparticle pair creation. The possible nature of the symmetry-breaking mechanism is briefly discussed.
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