Detecting Majorana nature of neutrinos in muon and tau decay

Details Detecting Majorana nature of neutrinos in muon and tau decay Detecting Majorana nature of neutrinos in muon and tau decay

2008-09-30

arxiv.org/abs/0809.5221v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure; Added references

Scientific paper

The Majorana nature of neutrinos can be detected by the precise measurement of muon decay. This possibility comes from the presence of charged Higgs boson interaction for Majorana neutrinos. We study the effects of the neutrino Yukawa interaction via charged Higgs bosons in muon decay processes such as $\mu\to e\nu\bar{\nu}$ and $\mu\to e\gamma$. The Higgs triplet model with small vacuum expectation value is of special importance whose neutrino Yukawa coupling can affect significantly muon decays. External neutrino lines in the Feynman diagrams of $\mu\to e\nu\bar{\nu}$ can be crossed because of its Majorana nature. This fact provides the interference contribution between the W boson exchange diagram and that of charged Higgs boson, which may be detectable in near future experiments.

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