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Phenomenology of lepton flavor violation in 2HDM(III) from (g-2)_mu and leptonic decays

Authors
  • Díaz, R A
  • Martínez, R
  • Rodríguez, José Alberto
Publication Date
Aug 12, 2002
Identifiers
DOI: 10.1103/PhysRevD.67.075011
OAI: oai:cds.cern.ch:576303
Source
CERN Document Server
Keywords
Language
English
License
Unknown
External links

Abstract

We constrain some lepton flavor violating vertices in the context of the two Higgs doublet model type III, assuming that the lightest scalar Higgs mass m_{h^0} is about 115 GeV and that the pseudoscalar Higgs is heavier than h^0. Specifically, based on the g-2 muon factor as well as the leptonic decays mu --> e gamma, tau --> mu gamma the following quite general bounds are obtained, 7.62 times 10^{-4} <~ xi_{mu tau}^2 <~ 4.44 times 10^{-2}, xi_{e tau}^2 xi_{mu tau}^2 <~ 2.24 times 10^{-16}, xi_{e tau}^2 <~ 2.77 times 10^{-14}. Additionally bounds on xi_{tau tau} are also obtained, such constraints on xi_{tau tau} still gives enough room for either a strong suppression$ $or strong enhancement on the coupling of any Higgs boson to a pair of tau leptons. Additionally, upper limits on the decay widths of the leptonic decays tau --> e gamma, tau --> mu mu mu and tau --> eee are calculated, finding them to stay far from the reach of near future experiments.

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