Neutrino-antineutrino oscillations as a possible solution for the LSND and MiniBooNE anomalies?

TL;DR

This paper explores how CPT and Lorentz symmetry violations could cause neutrino-antineutrino oscillations with resonances, potentially explaining anomalies observed in LSND and MiniBooNE experiments.

Contribution

It introduces a framework with four CPT-violating parameters that produce resonant neutrino-antineutrino oscillations, offering a novel explanation for experimental anomalies.

Findings

Resonance structures depend on CPT-violating parameters.

Possible explanation for LSND and MiniBooNE anomalies.

Analysis of charge conjugation eigenstates in oscillations.

Abstract

We investigate resonance structures in CPT and Lorentz symmetry violating neutrino-antineutrino oscillations in a two generation framework. We work with four non-zero CPT-violating parameters that allow for resonant enhancements in neutrino-antineutrino oscillation phenomena in vacuo which are suitably described in terms of charge conjugation eigenstates of the system. We study the relation between the flavor, charge conjugation and mass eigenbasis of neutrino-antineutrino oscillations and examine the interplay between the available CPT-violating parameter space and possible resonance structures. Eventually we remark on the consequences of such scenarios for neutrino oscillation experiments, namely possible solutions for the LSND and MiniBooNE anomalies.