Majorana Neutrinos in Muon Decay

Details Majorana Neutrinos in Muon Decay Majorana Neutrinos in Muon Decay

2006-01-27

arxiv.org/abs/hep-ph/0601231v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages. Talk given at NNR05 workshop on Neutrino Nuclear Responses in Double Beta Decays and Low-energy Astro-neutrinos, CAST

Scientific paper

The normal muon decay $\mu^{+} \to e^{+}\nu_{e}\bar{\nu_{\mu}}$ is studied as a tool to discriminate between the Dirac and Majorana type neutrinos. For the purpose to do this, we propose a new parameterization in place of the Michel parameters for the energy spectrum of $e^{+}$. The $\chi^2$-fitting is used by noticing different energy spectra between the Dirac and Majorana neutrino cases. We assume the interaction Hamiltonian which consists of the $V-A$ and $V+A$ charged currents.

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