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Sterile-active neutrino oscillations and shortcuts in the extra dimension

Heinrich Päs·Sandip Pakvasa·Thomas J. Weiler
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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.

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Heinrich Päs, Sandip Pakvasa, Thomas J. Weiler. 2005-11-08. Sterile-active neutrino oscillations and shortcuts in the extra dimension. https://doi.org/10.1103/physrevd.72.095017

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