Search for a light extra gauge boson in Littlest Higgs model at a linear collider
Abstract
Littlest Higgs model predicts some extra particles beyond the Standard Model. Among them, an extra neutral gauge boson AH is lightest and its mass could be a few hundred GeV. We study production and decay of AH at future e+ e- inear collider and compare them with those of Z' bosons in supersymmetric (SUSY) E6 models. We find that, if the extra gauge boson mass is smaller than s of the linear collider, the forward-backward asymmetries of b- and c-quarks at the AH pole differ significantly from those given by the Z' bosons, and are useful to test the littlest Higgs model and SUSY E6 models.
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