Measurement of lepton flavor violating yukawa couplings at ILC

S. Kanemura, T. Ota, K. Tsumura

Research output: Contribution to conferencePaperpeer-review


We discuss lepton flavor violation (LFV) associated with tau leptons in the general framework of the two Higgs doublet model, in which LFV couplings are introduced as a deviation from Model II Yukawa interaction. Parameters of the model are constrained from experimental results and also from requirements of theoretical consistencies such as vacuum stability and perturbative unitarity. Current data for LFV rare tau decays provide substantial upper limits on the LFV Yukawa couplings in the large tanβ region, which are comparable with predictions in fundamental theories. Here tan β is the ratio of vacuum expectation values of the two Higgs doublets. A search for the LFV decays φ0→ τ±μ±e) of neutral Higgs bosons (φ0 = h, H and A) at future collider experiments can be useful to further constrain the LFV couplings, especially in the relatively small tanβ region (tan β ≲ 30), where rare tau decay data cannot give any strong limit.

Original languageEnglish
Publication statusPublished - 2005
Externally publishedYes
Event2005 International Linear Collider Workshop, LCWS 2005 - Stanford, CA, United States
Duration: Mar 18 2005Mar 22 2005


Other2005 International Linear Collider Workshop, LCWS 2005
Country/TerritoryUnited States
CityStanford, CA

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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