Electroweak-scale mirror fermions, $μ\to e γ$ and $τ\to μ γ$

Details Electroweak-scale mirror fermions, $μ\to e γ$ and $τ\to μ γ$ Electroweak-scale mirror fermions, $μ\to e γ$ and $τ\to μ γ$

2007-11-05

arxiv.org/abs/0711.0733v3

Phys.Lett.B659:585-592,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 double-column pages, 1 embedded figure. Version accepted for publication in Phys. Lett. B includes the following additions:

Scientific paper

10.1016/j.physletb.2007.12.005

The Lepton Flavour Violating (LFV) processes $\mu \to e \gamma$ and $\tau \to \mu \gamma$ are estimated in a model of electroweak-scale right-handed neutrinos. The present bounds on the branching ratios, $B(\mu \to e \gamma)< 1.2 \times 10^{-11}$, $B(\tau \to \mu \gamma) < 6.8 \times 10^{-8}$ (BaBar) and $< 4.5 \times 10^{-8}$ (Belle), puts strong constraints on the parameters of the model. This constraint links low energy rare decay processes to high-energy phenomena (e.g. decay lengths of the mirror charged leptons which are important in the search for the telltale like-sign dilepton events present in the model of electroweak-scale right-handed neutrinos).

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