Muon anomalous magnetic moment and the heavy photon in a little Higgs model

Abstract

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.

minor changes with references added, 17 pages, 7 figures, RevTeX

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• Models of Little Higgs and Electroweak Precision Tests
• Alternatives to an Elementary Higgs
• The Littlest Higgs boson at a photon collider
• Little Higgses and Turtles
• Light pseudoscalar eta and H->eta eta decay in the simplest little Higgs mode
• Phenomenology of Top Partners at the ILC
• Muon anomalous magnetic moment in the standard model extension
• Determination of Littlest Higgs model parameters at the ILC
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• A concise review on some Higgs-related new physics models in light of current experiments
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• Single production of new gauge bosons from the littlest Higgs model at the $TeV$ energy $e^{-}\gamma$ colliders
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• Single production of the vector-like top quark in the littlest Higgs model at TeV energy $e^{-}\gamma$ colliders
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• Phenomenology of the Littlest Higgs model
• Charged Higgs Production in Association With W^{\pm} at Large Hadron Colliders
• Direct search limits on the Littlest Higgs model
• Probing the lightest new gauge boson $B_H$ in the littlest Higgs model via the processes $\gamma \gamma \to f\bar{f}{B}_H$ at the ILC
• Single production of the gauge boson $W$ via polarized $e^{-}\gamma$ collisions in the littlest Higgs model
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• Generalized quantum electrodynamics: one-loop correction
• Associated $Z^0{H}^0$ production with leptonic decays at LHC in next-to-leading order QCD
• $HZ$ associated production at the LHC within the littlest Higgs model at NLO+NLL accuracy