2002/09/09 by D. Demir, D. A. Demir, Tony Gherghetta +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1016/s0370-2693(02)02902-7
published as Phys.Lett.B549:194-203,2002 · 13 pages, latex, 2 eps figure clarifications and reference added
arxiv created 2002/09/09 · openalex publication_date 2002/11/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
In models where the Standard Model spectrum is localized on a brane embedded in a higher-dimensional spacetime, we discuss the lepton number violation induced by the emission of right-handed neutrinos from the brane. We show that the presence of the right-handed neutrinos in the bulk may lead to rapid lepton number violating processes which above the electroweak scale would wash away any prior lepton or baryon asymmetry. We derive constraints on the Yukawa couplings of these states in order to preserve the lepton asymmetry. We show that this has a natural interpretation in the brane world.