LSND anomaly from CPT violation in four-neutrino models
V. Barger, D. Marfatia, K. Whisnant
Abstract
The LSND signal for νμto νe oscillations has prompted supposition that there may be a fourth light neutrino or that CPT is violated. Neither explanation provides a good fit to all existing neutrino data. We examine the even more speculative possibility that a four-neutrino model with CPT violation can explain the LSND effect and remain consistent with all other data. We find that models with a 3+1 mass structure in the neutrino sector are viable; a 2+2 structure is permitted only in the antineutrino sector.
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