Lepton flavor violation in Higgs boson decays under the rare tau decay results

Shinya Kanemura, Toshihiko Ota, Koji Tsumura

研究成果: Contribution to journalArticle査読

75 被引用数 (Scopus)


We study lepton flavor violation (LFV) associated with tau leptons in the 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 rare tau decays provide substantial upper limits on the LFV Yukawa couplings in the large tanβ region (tanβ30), which are comparable with predictions in fundamental theories. Here tanβ is the ratio of vacuum expectation values of the two Higgs doublets. We show that a search for the LFV decays 0→τ±μ (τ±e) of neutral Higgs bosons (0=h,H and A) at future collider experiments can be useful to further constrain the LFV couplings especially in the relatively small tanβ region (tanβ30), where rare tau decay data cannot give any strong limit.

ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
出版ステータス出版済み - 1 1 2006

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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