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Particle physics in the very early universeEvents in the very early big bang universe in which elementary particle physics effects may have been dominant are discussed, with attention to the generation of a net baryon number by way of grand unification theory, and emphasis on the possible role of massive neutrinos in increasing current understanding of various cosmological properties and of the constraints placed on neutrino properties by cosmology. It is noted that when grand unification theories are used to describe very early universe interactions, an initially baryon-symmetrical universe can evolve a net baryon excess of 10 to the -9th to 10 to the -11th per photon, given reasonable parameters. If neutrinos have mass, the bulk of the mass of the universe may be in the form of leptons, implying that the form of matter most familiar to physical science may not be the dominant form of matter in the universe.
Document ID
19820055095
Document Type
Reprint (Version printed in journal)
Authors
Schramm, D. N. (Chicago, University Chicago, IL, United States)
Date Acquired
August 10, 2013
Publication Date
December 29, 1981
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSG-7212
CONTRACT_GRANT: DE-AC02-80ER-10773
CONTRACT_GRANT: NSF AST-78-20402
Distribution Limits
Public
Copyright
Other