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

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 top-charm quark production processes image 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. On the other hand, we make a comparison among various New Physics models and find that the cross sections of image in the LHT model are significantly larger than those in other New Physics models. So the processes image may also provide a way to distinguish the LHT model from the others.