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LSND anomaly from CPT violation in four-neutrino models

V. Barger·D. Marfatia·K. Whisnant
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Abstract

The LSND signal for \barν_μto \barν_e 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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V. Barger, D. Marfatia, K. Whisnant. 2003-08-28. LSND anomaly from CPT violation in four-neutrino models. https://doi.org/10.1016/j.physletb.2003.10.004

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