Abstract
We examine the direct limits on masses of extra neutral gauge bosons in the model with a little Higgs mechanism confronted with the Large Hadron Collider (LHC) data, especially by embedding an anomaly-free set of fermions. There exist two extra neutral gauge bosons, called and in this model. The lower exclusion limit of the mass of the lighter extra neutral gauge boson is about 3 TeV, while that of the heavier one is 5 TeV. For comparison, we examine the mass limit of the boson in the model as well and discuss the implication of our result in the model with a standard Higgs mechanism. We also discuss the discovery potential of and at the future LHC with a center-of-momentum energy of 14 TeV. Our results can be applicable to models with a regular Higgs mechanism if the same type of fermion family is assigned.
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