tbW vertex in the Littlest Higgs Model with T-parity

Abstract

A study of the effective tbW vertex is done in the littlest Higgs model with T parity that includes the one loop induced weak dipole coefficient f_{2R}. The top's width, the W-boson helicity in the t-> bW^+ decay as well as the t-channel and the s-channel modes of single top quark production at the LHC are then obtained for the tbW coupling. Our calculation is done in the Feynman-'t Hooft gauge, and we provide details of the analysis, like exact formulas (to all orders of the expansion variable v/f) of masses and mixing angles of all the particles involved. Also, a complete and exact diagonalization (and normalization) of the scalar sector of the model is made.

Version published in Phys. Rev. D79, 015013 (2009)

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• Precise limits from lepton flavour violating processes on the Littlest Higgs model with T-parity
• A General Analysis of Wtb anomalous Couplings
• The Top Quark Decay Vertex in Standard Model Extensions
• Probing $tt\gamma$ and $ttZ$ couplings at the LHeC
• The lepton flavor violating decays $Z\to l_i{l}_j$ in the simplest little Higgs model
• On-shell $WW\gamma$ vertex in the T-Parity and non T-Parity Littlest Higgs model
• The anomalous top quark coupling tqg and tW production at the LHC