Detecting Majorana nature of neutrinos in muon and tau decay

2008/09/30 by Takeshi Fukuyama, Fukuyama, Takeshi, Koji Tsumura +1 · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.48550/arxiv.0809.5221

4 pages, 1 figure; Added references

openalex publication_date 2008/09/30 · arxiv created 2008/10/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 μ→ eνν and μ→ eγ. 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 μ→ eνν 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.

Cited by

• Measuring the lower bound of the neutrino mass at the LHC in the Higgs triplet model
• Limits on neutrinophilic two-Higgs-doublet models from flavor physics

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