Nonequilibrium electroweak baryogenesis at preheating after inflation
- Theoretical Physics, Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, (United Kingdom)
- Institute for Nuclear Research of Russian Academy of Sciences, Moscow 117312, Russia (Russian Federation)
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095-1547 (United States)
- Institute for Theoretical Physics, University of Lausanne, CH-1015 Lausanne, (Switzerland)
We present a novel scenario for baryogenesis in a hybrid inflation model at the electroweak scale, in which the standard model Higgs field triggers the end of inflation. One of the conditions for successful baryogenesis, the departure from thermal equilibrium, is naturally achieved at the stage of preheating after inflation. The inflaton oscillations induce large occupation numbers for long-wavelength configurations of the Higgs and gauge fields, which leads to a large rate of sphaleron transitions. We estimate this rate during the first stages of reheating and evaluate the amount of baryons produced due to a particular type of higher-dimensional CP violating operator. The universe thermalizes through fermion interactions, at a temperature below critical, T{sub rh}(less-or-similar sign)100 GeV, preventing the wash-out of the produced baryon asymmetry. Numerical simulations in 1+1 dimensions support our theoretical analyses. (c) 1999 The American Physical Society.
- OSTI ID:
- 20218061
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 60, Issue 12; Other Information: PBD: 15 Dec 1999; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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