Intrinsic flavor violation for massive neutrinos

Details Intrinsic flavor violation for massive neutrinos Intrinsic flavor violation for massive neutrinos

2008-10-16

arxiv.org/abs/0810.2812v3

Phys.Rev.D78:113007,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

v3: published version

Scientific paper

10.1103/PhysRevD.78.113007

It is shown that intrinsic neutrino flavor violation invariably occurs when neutrinos are created within the SM augmented by the known massive neutrinos, with mixing and nondegenerate masses. The effects are very small but much greater than the naive estimate $\Delta m^2/E_\nu^2$ or the branching ratio of indirect flavor violating processes such as $\mu\to e\gamma$ within the SM. We specifically calculate the probability (branching ratio) of pion decay processes with flavor violation, such as $\pi\to \mu\bar{\nu}_e$, showing nonzero results.

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