Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..317l&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 196, July 1981, p. 317-338.
Astronomy and Astrophysics
Astronomy
10
Astronomical Models, Baryons, Black Holes (Astronomy), Cosmic Rays, Cosmology, Universe, Astronomical Spectroscopy, Bosons, Evaporation Rate, Galactic Evolution, Particle Mass, Particle Production
Scientific paper
The theory of primordial black holes (PBH) and the cosmic baryon number are analyzed, and evolutionary cosmological models in which the black hole spectrum is fixed by the choice of density fluctuations imposed at the Planck time are investigated. The models are examined in the light of unified theories of elementary particles in which X-bosons, produced thermally and by the evaporation decay of black holes give rise to a non-zero baryon number. Emphasis is given to a comparative analysis of the PBH models and the standard baryon generation models. It is suggested that difficulties arise in finding models in which a black hole population large enough to produce a significant baryon excess does not upset the standard big bang at a later time. The presence of density fluctuations can lead to a longer lived PBH population, but this cannot prevent the temperature from rising rapidly to levels above the grand unification energy. Consequently, thermal production of X-bosons must always make some contribution to the cosmic baryon number.
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