Top Quark Polarization and Spin Correlation in the Littlest Higgs Model with T-Parity at the ILC

Abstract

In the framework of the littlest Higgs model with T-parity (LHT), we study the top quark spin correlation and polarization at the International Linear Collider (ILC). We find that the top quark polarization asymmetry δPt and the left-right asymmetry δALR can respectively reach −35% and −37.5% for √s = 500 GeV and √s = 1000 GeV via e+e− collision, which can reach the observable level at the ILC. By contrast, the spin correlation δC is smaller. The correlation behaviors of these observables at the e+e− collision and the γγ collision will be helpful to distinguish different models and test the LHT model at the ILC.