Higgs-mediated Bs,d0→μτ,eτ and τ→3μ,eμμ decays in supersymmetric seesaw models
Higgs-mediated Bs,d0→μτ,eτ and τ→3μ,eμμ decays in supersymmetric seesaw models
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超对称跷跷板模型中希格斯介导的 Bs,d0→μτ,eτ 和 τ→3μ,eμμ 衰减
DOI:
10.1016/s0370-2693(02)02900-3
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发表时间:
2002
影响因子:
4.4
通讯作者:
M. Raidal
中科院分区:
文献类型:
--
作者:
A. Dedes;J. Ellis;M. Raidal
We study the rates allowed for the Higgs-mediated decays Bs,d0→μτ,eτ and τ→μμμ,eμμ in supersymmetric seesaw models, assuming that the only source of lepton flavour violation (LFV) is the renormalization of soft supersymmetry-breaking terms due to off-diagonal singlet-neutrino Yukawa interactions. These decays are strongly correlated with, and constrained by, the branching ratios for Bs,d0→μμ and τ→μ(e)γ. Parametrizing the singlet-neutrino Yukawa couplings Yνand masses MNiin terms of low-energy neutrino data, and allowing the flavour-universal soft masses for sleptons and for squarks, as well as those for the two Higgs doublets, to be different at the unification scale, we scan systematically over the model parameter space. Neutrino data and the present experimental constraints set upper limits on the Higgs-mediated LFV decay rates Br(Bs0→μτ,eτ)≲4×10−9and Br(τ→μμμ,eμμ)≲4×10−10.