Wave packet treatment of neutrino flavor oscillations in various spacetimes

Abstract

We study the effect of gravity on neutrino flavor oscillations when each mass eigenstate is described by a wave packet instead of a plane wave. Two different approaches for implementing the wave packet formalism in the study of neutrino flavor oscillations in curved spacetime are examined. We work with a general static and spherically symmetric spacetime before applying our results to a few spacetime metrics of interest. We first focus on general relativity by examining the effect of the exterior and interior Schwarzschild solutions, as well as the de Sitter-Schwarzschild metric, and then we examine selected metrics from modified gravity models.

31 pages. 1 figure

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• Neutrino spin oscillation in screening models revisited
• Spin precession and neutrino helicity flip in various spacetimes
• Screening models and neutrino oscillations
• Neutrino flavor oscillations inside matter in conformal coupling models
• Imprints of vector field non-standard couplings on solar neutrino flux
• Neutrino decoherence and violation of the strong equivalence principle
• What can we learn from the conformal noninvariance of the Klein-Gordon equation?