Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-06-13
Phys.Rev.D69:115010,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
minor changes with references added, 17 pages, 7 figures, RevTeX
Scientific paper
10.1103/PhysRevD.69.115010
In the Littlest Higgs model, we comprehensively study the phenomenology of the heavy photon A_H which is lightest, in most of the parameter space, among newly introduced heavy gauge bosons and top-like vector quark. Unexpected behavior is that lighter A_H suppresses the corrections to the electroweak precision observables. For the global symmetry breaking scale f~3TeV, the heavy photon can be light enough to be produced at the 500 GeV linear collider. Through the calculation of the one-loop correction to the muon anomalous magnetic moment, we show that even the light A_H with mass around 200 GeV results in the negligible contribution. This is consistent with the current inconclusive status of the theoretical calculation of the (g-2)_mu in the SM. The effects of the Littlest Higgs model on the process e+ e- -> mu+ mu- are also studied, which is one of the most efficient signals to probe the A_H.
Park Seong Chan
Song JeongHyeon
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