2005/09/01 by Shinya Kanemura, Kanemura, Shinya, Toshihiko Ota +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0509005
To appear in the proceedings of 2005 International Linear Collider Workshop (LCWS2005), 17-22 March 2005, Stanford, California, USA
arxiv created 2005/09/01 · openalex publication_date 2005/09/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 tanβ is the ratio of vacuum expectation values of the two Higgs doublets. A search for the LFV decays ϕ0 → τ^± μ^∓ (τ^± 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 (tanβ\lesssim 30 ), where rare tau decay data cannot give any strong limit.