2003/04/30 by Hyung Do Kim, Stuart Raby · 3 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Brane #Compactification (mathematics) #Extra dimensions #MAJORANA #Majorana equation #Measurements of neutrino speed #Neutrino #Neutrino Physics Research #Neutrino oscillation #Particle physics #Particle physics theoretical and experimental studies #Physics #Solar neutrino #Sterile neutrino #Theoretical physics #hep-ph
paper · pdf · doi:10.1088/1126-6708/2003/07/014
published as JHEP 0307 (2003) 014 · 24 pages
openalex publication_date 2003/07/07 · arxiv created 2003/08/03 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study neutrino physics in a 5D supersymmetric SO(10) GUT. We analyze several different choices for realizing the See-Saw mechanism. We find that the "natural" scale for the Majorana mass of right-handed neutrinos depends critically on whether the right-handed neutrinos are located in the bulk or localized on a brane. In the former case, the effective Majorana mass is "naturally" of order the compactification scale, about 1014 GeV. Note, this is the value necessary for obtaining a light tau neutrino mass approximately 10-2 eV which, within the context of hierarchical neutrino masses, is the right order of magnitude to explain atmospheric neutrino oscillations. On the other-hand when the right-handed neutrino is localized on the brane, the effective Majorana mass is typically larger than the compactification scale. Nevertheless with small parameters of order 1/10 - 1/30, an effective Majorana mass of order 1014 GeV can be accommodated. We also discuss the constraints on model building resulting from the different scenarios for locating the right-handed neutrinos.