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

Abstract

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.

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

Cited by in corpus (5)

• Direct determination of neutrino mass parameters at future colliders
• Testing neutrino masses in little Higgs models via discovery of doubly charged Higgs at LHC
• Search for Lepton Flavor Violating tau Decays into Three Leptons
• Predictive model for dark matter, dark energy, neutrino masses and leptogenesis at the TeV scale
• Single production of the doubly charged scalar in the littlest Higgs model