Probing the gauge bosons Z′ and B′ from the littlest Higgs model in the high-energy linear e+e- colliders

The littlest Higgs (LH) model predicts the existence of the new gauge bosons Z' and B'. We calculate the contributions of these new particles to the processes e(+)e(-) ->(f) over bar f with f = tau, mu, b or c and study the possibility of detecting these new particles via these processes in the future high-energy linear e(+)e(-) collider (LC) experiments with root s = 500 GeV and (int) pound = 340 fb(-1). We find that, with reasonable values of the parameter preferred by the electroweak precision data, the possible signals of these new particles might be detected. The Z' mass M-Z' can be explored up to 2.8 TeV via the process e(+)e(-) (b) over barb for 0.3 <= c <= 0.5 and the B' mass M-B' can be explored up to 1.26 TeV via the process e(+)e(-) -> (l) over barl for 0.64 <= c' <= 0.73. (c) 2005 Elsevier B.V. All rights reserved.