Cosmological consequences of grand unified theories on density fluctuations

Details Cosmological consequences of grand unified theories on density fluctuations Cosmological consequences of grand unified theories on density fluctuations

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.291..133l&link_type=abstract

Nature, vol. 291, May 14, 1981, p. 133, 134.

Physics

1

Cosmology, Density Distribution, Fluctuation Theory, Matter (Physics), Adiabatic Conditions, Astronomical Models, Baryons, Inhomogeneity

Scientific paper

Recent investigations into the cosmological consequences of grand unified theories (GUTs) of elementary particles have shown that the observed matter-antimatter asymmetry of the Universe can be explained without recourse to the hypothesis of specific initial conditions. It is shown here that the origin of inhomogeneities in the matter distribution, which are thought to be responsible for the later formation of galaxies, cannot be explained by a simple addition of density fluctuations to the standard model. The appearance of these fluctuations, after the epoch when baryon number is fixed, is almost purely adiabatic, any departure from adiabaticity falling off in inverse proportion to the mass of the perturbation.

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