1999/02/28 by Juan Garcia-Bellido, J. García-Bellido, Dmitri Grigoriev +2
Physics and Astronomy · #Baryogenesis #Baryon #Baryon asymmetry #Baryon number #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Electroweak interaction #Higgs boson #Inflation (cosmology) #Inflaton #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum electrodynamics #Quantum mechanics #Sphaleron #Theoretical physics #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevd.60.123504
published as Phys. Rev. D 60, 123504 (1999) · 11 pages, ReVTeX, 16 figures inserted with epsf. Small changes in the introduction and new references
arxiv created 1999/03/08 · openalex publication_date 1999/11/15 · arxiv updated 2016/08/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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, Trh\ensuremath\lesssim100 GeV, preventing the wash-out of the produced baryon asymmetry. Numerical simulations in 1+1 dimensions support our theoretical analyses.