Flavor changing top quark decay and bottom-strange production in the littlest Higgs model with T-parity

TL;DR

This paper investigates flavor-changing processes in the Littlest Higgs model with T-parity, showing potential enhancements in top quark decay and bottom-strange production that could be observed at future colliders.

Contribution

It provides one-loop level calculations of flavor-changing effects in the LHT model, highlighting possible experimental signatures distinct from the Standard Model.

Findings

Top quark decay t→cH can be significantly enhanced in the LHT model.

bar{s} production cross section can reach 0.1 fb in some parameter space.

LHT effects on e+e−→bar{s} might be detectable at future colliders.

Abstract

Flavor changing effects on the processes \tch, \eebs, \eebsh and \ppbs in the LHT model are investigated in this paper. We calculate the one-loop level contributions from the T-parity odd mirror quarks and gauge bosons. The results show that the top quark rare decay \tch in the LHT model can be significantly enhanced relative to that in the SM. The $b\bar{s}$ production at linear colliders in the LHT model can enhance the SM cross section a lot and reach 0.1 fb in some parameter space allowed in the experiment. But the heavy gauge boson and mirror fermion loops have small contribution to the processes \ppbs and \eebsh. So the LHT effect on \eebs might be detected at future linear colliders, while it's too small to be seen for the \eebsh and \ppbs processes at future linear colliders and LHC.