Sterile-active neutrino oscillations and shortcuts in the extra dimension
Apr, 2005Citations per year
Abstract:
We discuss a possible new resonance in active-sterile neutrino oscillations arising in theories with large extra dimensions. Fluctuations in the brane effectively increase the path-length of active neutrinos relative to the path-length of sterile neutrinos through the extra-dimensional bulk. Well below the resonance, the standard oscillation formulas apply. Well above the resonance, active-sterile oscillations are suppressed. We show that a resonance energy in the range of 30-400 MeV allows an explanation of all neutrino oscillation data, including LSND data, in a consistent four-neutrino model. A high resonance energy implies an enhanced signal in MiniBooNE. A low resonance energy implies a distorted energy spectrum in LSND, and an enhanced v_mu depletion from a stopped-pion source. The numerical value of the resonance energy may be related back to the geometric aspects of the brane world. Some astrophysical and cosmological consequences of the brane-bulk resonance are briefly sketched.- 14.60.St
- 11.25.Wx
- neutrino: oscillation
- neutrino: sterile
- space-time: higher-dimensional
- space-time: fluctuation
- resonance: energy
- neutrino: path length
- membrane model
- nuclear physics
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