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K\\\"orner, Lauri Kaldam\\\"ae, Stefan Berge, Stefan Groote","submitted_at":"2015-05-25T09:03:01Z","abstract_excerpt":"We consider lepton-mass effects in the cascade decays $H\\to Z(\\to \\ell^{+} \\ell^{-})+Z^{\\ast}(\\to \\tau^{+}\\tau^{-})$ and $H\\to W^{-}(\\to \\ell^{-}\\bar \\nu_{\\ell})+W^{+\\ast}(\\to \\tau^{+}\\nu_{\\tau})$. Since the scale of the problem is set by the off-shellness $q^{2}$ of the respective gauge bosons in the limits $(m_{\\ell}+m_{\\ell'})^{2} \\le q^{2} \\le (m_{H}-m_{W,Z})^{2}$ and not by $m_{W,Z}^{2}$, lepton-mass effects are non-negligible for the $\\tau$ modes in particular close to the threshold of the off-shell decays. 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