Unified gauge theories and the baryon number of the universe

Details Unified gauge theories and the baryon number of the universe Unified gauge theories and the baryon number of the universe

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phrvl..41..281y&link_type=abstract

Physical Review Letters, vol. 41, July 31, 1978, p. 281-284.

Physics

206

Baryons, Cosmology, Particle Density (Concentration), Universe, Antimatter, Density (Number/Volume), Fireballs, Matter (Physics), Photons, Relativity

Scientific paper

It is suggested that the dominance of matter over antimatter in the present universe is a consequence of baryon-number-conserving reactions in the very early fireball. Generation of the required baryon number is provided by grand unified gauge theories of weak, electromagnetic, and strong interactions, which predict simultaneous violation of baryon-number conservation and CP invariance. More interestingly, the mechanism can explain why the ratio of the baryon-to-photon-number density in the present universe is so small.

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