Single Production of Vector-Like Top Quark in the Littlest Higgs Model at TeV Energy e ⁻ γ Colliders

Abstract

The existence of a new colored vector-like heavy fermion T is a crucial prediction in little Higgs models, which play a key role in breaking the electroweak symmetry. The littlest Higgs model is the most economical one among various little Higgs models. In the context of the littlest Higgs model, we study single production of the new heavy vector-like quark and discuss the possibility of detecting this new particle in the future LC experiment. We find that the production cross section is in the range of 1.7×10 −3 −30f b at TeV energy electron-photon collider with √ s = 3T eV and a yearly integrated luminosity of £ = 500f b −1 .

Single Production of Top Quark via e − γ Collision in Left-Right Twin Higgs Model

“…The little Higgs models and the three-site Higgsless model also predict the existence of the heavy vector-like top quark, its production in future high energy collider experiments are studied in Refs. [20]. They have shown that the heavy vector-like top quark can also produce the observed signature at the high energy colliders.…”

SU (3) simple group model and single top production at the e − γ colliders

“…Little Higgs models contain new gauge bosons, a heavy top-like quark, and new scalars, which cancel the quadratically divergent one-loop contributions to the Higgs boson mass from the SM gauge bosons, top quark, and Higgs self-interaction, respectively. Some of these new particles can generate characteristic signatures at the present and future collider experiments [2] . There are several variations of the little Higgs models, which differ in the assumed higher symmetry and in the representations of the scalar multiplets.…”