Baryon-dominated universe with antimatter regions.

Details Baryon-dominated universe with antimatter regions. Baryon-dominated universe with antimatter regions.

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999grco....5..246r&link_type=abstract

Gravit. Cosmol., Vol. 5, No. 4, p. 246 - 252

Mathematics

Logic

1

Antimatter: Universe, Antimatter: Cosmological Models

Scientific paper

The authors discuss the evolution of a U(1) symmetric scalar field at the inflation epoch with a pseudo Nambu-Goldstone tilt emerging after the end of exponential expansion of the Universe. The U(1) symmetry is supposed to be associated with baryon charge. It is shown that quantum isocurvature fluctuations lead in a natural way to a baryon-dominated Universe with antibaryon excess regions. The range of parameters is calculated at which the fraction of Universe occupied by antimatter and the size of antimatter regions satisfy the observational constraints and lead to effects, accessible to experimental search for antimatter.

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