Muon Decay to One Loop Order in the Left-Right Symmetric Model

Details Muon Decay to One Loop Order in the Left-Right Symmetric Model Muon Decay to One Loop Order in the Left-Right Symmetric Model

2002-05-27

arxiv.org/abs/hep-ph/0205303v1

Nucl.Phys.B642:157-172,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 7 figures

Scientific paper

10.1016/S0550-3213(02)00638-7

One loop corrections to the muon decay are studied in a popular and self-consistent version of the Left-Right symmetric model. It is shown quantitatively, that the corrections do not split into those that come from the Standard Model sector and some decoupling terms. For a heavy Spontaneous Symmetry Breaking (SSB) scale of the order of a least 1 TeV, the contributions from the top quark have a logarithmic behaviour and there is a strong quadratic dependence on the heavy Higgs scalar masses. The dependence on the light Higgs boson mass is small. The heavy neutrinos are shown to play an important role, although secondary in comparison with the heavy scalar particles as long as the heavy neutrinos' Majorana Yukawa coupling matrix $h_M$ obeys unitarity bounds.

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