2006/12/22 by Sietse van der Post, Sietse T. van der Post, van der Post, Sietse +2
Mathematics · Physics and Astronomy · #Astrophysics (astro-ph) #Baryogenesis #Black Holes and Theoretical Physics #Brans–Dicke theory #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Mathematical economics #Mathematical physics #Mathematics #Philosophy #Physics #Quantum mechanics #Relativity and Gravitational Theory #Theoretical physics #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.hep-ph/0612313
12 pages, 2 figures
arxiv created 2006/12/22 · openalex publication_date 2006/12/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A new mechanism for baryogenesis is proposed in the context of an extended Brans-Dicke (BD) theory. We generalize the BD scalar to complex field with CP violating coupling to curvature and show that the charged BD current can be enhanced during inflationary epoch. After inflation the current decays (via tree level interactions) into the standard model particles. When the BD scalar is charged under baryon and/or lepton number, the decay produces a net baryon number. Rather generically a sufficiently large scalar current can be produced during inflation to account for the observed baryon asymmetry of the Universe. Our baryogensis scenario can in an elegant way be incorporated into a model of extended inflation.