Lepton Flavour Violating tau Decays in the Left-Right Symmetric Model

Abstract

The Left-Right symmetric extension of the Standard Model with Higgs isospin triplets can provide neutrino masses via a TeV scale seesaw mechanism. The doubly charged Higgs bosons H^{\pm\pm}_L and H^{\pm\pm}_R induce lepton flavour violating decays τ^\pm \to lll at tree-level via a coupling which is related to the Maki-Nakagawa-Sakata matrix (V_{\rm MNS}). We study the magnitude and correlation of τ^\pm \to lll and μ\to eγwith specific assumptions for the origin of the large mixing in V_{\rm MNS} while respecting the stringent bound for μ\to eee. It is also shown that an angular asymmetry for τ^\pm \to lll is sensitive to the relative strength of the H^{\pm\pm}_L and H^{\pm\pm}_R mediated contributions and provides a means of distinguishing models with doubly charged Higgs bosons.

24 pages, 16 figures, added references, notation clarified, added discussion of effect of Majorana phases, version to appear in Physical Review D

References in corpus (1)

• Lepton flavor violation in $\tau$ decays

Cited by in corpus (9)

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• Search for Lepton Flavor Violating tau Decays into Three Leptons
• A Compromise between Neutrino Masses and Collider Signatures in the Type-II Seesaw Model
• The lepton-flavour violating decay τ\to μμ\antimu at the LHC
• Two Higgs Bi-doublet Left-Right Model With Spontaneous P and CP Violation
• General Conditions for Lepton Flavour Violation at Tree- and 1-Loop Level