Impact of Single-Top Measurement to Littlest Higgs Model with T-Parity

Abstract

We show that a precise measurement of the single-top production cross section at the Tevatron and the LHC can strongly constrain the model parameters of the Littlest Higgs model with T-parity. A reduction in the single-top production rate from the Standard Model prediction implies new physics phenomena generated by the heavy T-parity partners of the top quark. We show that the degree of polarization of the top quark produced from the decay of its heavy T-odd partner ($T_{-}$) can be utilized to determine the new physics energy scale, and the mass of $T_{-}$ can be measured from the missing transverse momentum distribution in the $T_{-}{\bar{T}}_{-}$ event.

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• Single production of the top partners at high energy colliders
• Next-to-leading order QCD corrections to s-channel single top quark production and decay at the LHC
• Testing the Littlest Higgs Model with T-parity at the Large Hadron Collider
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