2009/05/31 by Sebastian Hollenberg, Octavian Micu, Heinrich Päs +2 · 29 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Baseline (sea) #Computer science #Geology #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Oceanography #Particle physics theoretical and experimental studies #Physics #hep-ph
paper · pdf · doi:10.1103/physrevd.80.093005
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 80(9) (American Physical Society) · 20 pages, 5 figures
arxiv created 2009/05/31 · openalex publication_date 2009/11/23 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In extra-dimensional scenarios oscillations between active and sterile neutrinos can be governed by a new resonance in the oscillation amplitude. This resonance results when cancellation occurs between two phase differences, the usual kinematic one coming from the neutrino mass-squared difference, and a geometric one coming from the difference in travel times of the sterile neutrino through the bulk relative to the active neutrino confined to the brane. In this work we introduce a specific metric for the brane-bulk system, from which we explicitly derive extra-dimensional geodesics for the sterile neutrino, and ultimately the oscillation probability of the active-sterile two-state system. We find that for an asymmetrically warped metric, the resonance condition involves both the neutrino energy E and the travel distance L on the brane. In other words, the resonant energy may be viewed as baseline dependent. We show that to a good approximation, the resonance condition is not on E or on L, but rather on the product LE. The model is rich in implications, including the possibility of multiple solutions to the resonance condition, with ramifications for existing data sets, e.g., LSND and MiniBooNE. Some phenomenology with these brane-bulk resonances is discussed.