The flavor-changing top-charm quark production in the littlest Higgs model with T parity at the ILC

TL;DR

This paper investigates the potential of the International Linear Collider (ILC) to detect flavor-changing top-charm quark production predicted by the Littlest Higgs model with T-parity, highlighting its significance in probing new physics.

Contribution

It provides the first detailed analysis of top-charm production via FC processes in the LHT model at the ILC, demonstrating the model's observable effects at high energies.

Findings

LHT model predicts significant contributions to top-charm production at the ILC.

High mirror quark masses make these processes accessible at the ILC.

Top-charm production can test FC couplings and validate the LHT model.

Abstract

With high luminosity and energy at the ILC and clean SM backgrounds, the top-charm production at the ILC should have powerful potential to probe new physics. The littlest Higgs model with discrete symmetry named "T-parity"(LHT) is one of the most promising new physics models. In this paper, we study the FC processes $e^+e^-(\gamma\gamma)\to t\bar{c}$ at the ILC in the LHT model. Our study shows that the LHT model can make a significant contribution to these processes. When the masses of mirror quarks become large, these two processes are accessible at the ILC. So the top-charm production at the ILC provides a unique way to study the properties of the FC couplings in the LHT model and furthermore test the model.