2006/10/03 by G. Lambiase, Gaetano Lambiase · 2 citations
Mathematics · Physics and Astronomy · #Astrophysics #Asymmetry #Baryogenesis #Baryon #Baryon asymmetry #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Curvature #Dark energy #Geometry #Gravitation #Mathematical physics #Mathematics #Metric expansion of space #Noncommutative and Quantum Gravity Theories #Particle physics #Physics #Quantum gravity #Quantum mechanics #Ricci curvature #Scalar (mathematics) #Scalar curvature #Theoretical physics #f(R) gravity #hep-ph
paper · pdf · doi:10.1016/j.physletb.2006.09.037
published as Phys.Lett.B642:9-12,2006 · 5 pages, no figures
openalex publication_date 2006/10/03 · arxiv created 2006/12/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Standard Model extension with the inclusion of gravity is studied in the framework of the gravitational baryogenesis, a mechanism to generate the baryon asymmetry based on the coupling between the Ricci scalar curvature and the baryon current (∂μR)Jμ. We show that, during the radiation era of the expanding universe, a non-vanishing time derivative of the Ricci curvature arises as a consequence of the coupling between the coefficients for the Lorentz and CPT violation and Ricci's tensor. The order of magnitude for these coefficients are derived from current bounds on baryon asymmetry.