Lepton flavor violating signals of a little Higgs model at the high energy linear $e^{+}e^{-}$ colliders

Details Lepton flavor violating signals of a little Higgs model at the high energy linear $e^{+}e^{-}$ colliders Lepton flavor violating signals of a little Higgs model at the high energy linear $e^{+}e^{-}$ colliders

2007-01-03

arxiv.org/abs/hep-ph/0701017v2

Eur.Phys.J.C50:897-903,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 7 figures. Discussions and references added, typos corrected

Scientific paper

10.1140/epjc/s10052-007-0234-6

Littlest Higgs $(LH)$ model predicts the existence of the doubly charged scalars $\Phi^{\pm\pm}$, which generally have large flavor changing couplings to leptons. We calculate the contributions of $\Phi^{\pm\pm}$ to the lepton flavor violating $(LFV)$ processes $l_{i}\to l_{j}\gamma$ and $l_{i}\to l_{j}l_{k}l_{k}$, and compare our numerical results with the current experimental upper limits on these processes. We find that some of these processes can give severe constraints on the coupling constant $Y_{ij}$ and the mass parameter $M_{\Phi}$. Taking into account the constraints on these free parameters, we further discuss the possible lepton flavor violating signals of $\Phi^{\pm\pm}$ at the high energy linear $e^{+}e^{-}$ collider $(ILC)$ experiments. Our numerical results show that the possible signals of $\Phi^{\pm\pm}$ might be detected via the subprocesses $e^{\pm}e^{\pm}\to l^{\pm}l^{\pm}$ in the future $ILC$ experiments.

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