Lepton flavour violation in a left-right symmetric model

Pastor, Sergio ; Rindani, Saurabh D. ; Valle, José W. F. (1999) Lepton flavour violation in a left-right symmetric model Journal of High Energy Physics, 1999 (05). 012. ISSN 1126-6708

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Official URL: http://iopscience.iop.org/1126-6708/1999/05/012/

Related URL: http://dx.doi.org/10.1088/1126-6708/1999/05/012


We consider in this paper a Left-Right symmetric gauge model in which a global lepton-number-like symmetry is introduced and broken spontaneously at a scale ω that could be as low as 104 GeV or so. The corresponding physical Nambu-Goldstone boson, which we call majoron and denote J, can have tree-level flavour-violating couplings to the charged fermions, leading to sizeable majoron-emitting lepton-flavour-violating weak decays. We consider explicitly a leptonic variant of the model and show that the branching ratios for μ→e+J, τ→e+J and τ→μ+J decays can be large enough to fall within the sensitivities of future μ and τ factories. On the other hand the left-right gauge symmetry breaking scale may be as low as few TeV.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics Publishing.
Keywords:Spontaneous Symmetry Breaking; Global Symmetries; Beyond Standard Model; Rare Decays
ID Code:94689
Deposited On:18 Oct 2012 07:03
Last Modified:18 Oct 2012 07:03

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