Cosmological baryon-number domain structure and the first order phase transition of a vacuum
Abstract
If CP-nonconservation arises from spontaneous symmetry breaking in the very early universe, the universe will have a domain structure of baryon number. We propose a model of the early universe in which domains are stretched exponentially and the radius of the domains is much greater than that of the horizon of the standard big bang model, provided that the grand unified theory undergoes a first order phase transition. If the size of the stretched domains is sufficiently big to avoid pair annihilations of baryon and antibaryon domains, the difficulties of the baryon symmetric universe may be removed.
Present address.- Publication:
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Physics Letters B
- Pub Date:
- February 1981
- DOI:
- 10.1016/0370-2693(81)90805-4
- Bibcode:
- 1981PhLB...99...66S