Lepton flavor violating tau decays in type-III seesaw mechanism

Abstract

In this paper, the lepton flavor violating $\tau \to \ell P(V)$ ($P,V={\pi }^0,\eta ,{\eta }^{\prime },{\rho }^0,\omega ,\varphi$) and $\tau \to 3\ell$ ($\ell =e,\mu$) decays are studied in the framework of the type-III seesaw model, in which new triplet fermions with a zero hypercharge (Y=0) interact with ordinary lepton doublets via Yukawa couplings, and affect tree-level leptonic Z-boson couplings. We investigate the experimental bound from the leptonic Z decay to get contraint on the exsiting parameters space. We predict that the upper limits on the branching ratios of $\tau \to \ell P(V)$ and $\tau \to 3\ell$ can reach the experimental current limits.

15 pages, 1 figure, to match version in press in Phys.Rev.D

References in corpus (8)

• Type-III see-saw at LHC
• Probing seesaw at LHC
• $\mu \to e\gamma$ and $\tau \to l\gamma$ decays in the fermion triplet seesaw model
• Sommerfeld corrections to type-II and III leptogenesis
• The contribution of fermionic seesaws to the anomalous magnetic moment of leptons
• Lepton flavor violation in $\tau$ decays
• Lepton FCNC in Type III Seesaw Model
• Lepton flavor violation in type I + III seesaw

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• Lepton-flavor-violating semileptonic $\tau$ decay and $K\to \pi \nu \bar{\nu }$
• Lepton flavor violation decays ${\tau }^{-}\to {\mu }^{-}{P}_1{P}_2$ in the topcolor-assisted technicolor model and the littlest Higgs model with $T$ parity
• The Two Scales of New Physics in Higgs Couplings
• Search for lepton-flavor-violating $\tau$ decays into a lepton and a vector meson using the full Belle data sample
• Searching for lepton flavor violating decays tau to Pl in Minimal R-symmetric Supersymmetric Standard Model
• Exploring flavour space of an economical SU(5) GUT in future proton decay measurements