Eur. Phys. J. C (2007) 50: 897-903
https://doi.org/10.1140/epjc/s10052-007-0234-6

Regular Article - Theoretical Physics

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

Department of Physics, Liaoning Normal University, Dalian, 116029, P.R. China

^* e-mail: cxyue@lnnu.edu.cn

Received: 2 October 2006
Revised: 19 January 2007
Published online: 6 March 2007

Abstract

The littlest Higgs (LH) model predicts the existence of the doubly charged scalars , which generally have large flavor changing couplings to leptons. We calculate the contributions of Φ^±± to the lepton flavor violating (LFV) processes l_i→l_jγ and l_i→l_jl_kl_k, and we 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_Φ. Taking into account the constraints on these free parameters, we further discuss the possible lepton flavor violating signals of at high energy linear e⁺e^- collider (ILC) experiments. Our numerical results show that the possible signals of might be detected via the subprocesses e^±e^±→l^±l^± in future ILC experiments.