PAIR PRODUCTION OF CHARGED TOP-PIONS ASSOCIATED WITH Z GAUGE BOSON IN THE TOPCOLOR-ASSISTED TECHNICOLOR MODEL AT THE ILC

Abstract

The top-pions [Formula: see text] are the three additional typical particles predicted by the topcolor-assisted technicolor (TC2) model and the observation of these particles can be regarded as the direct evidence of the TC2 model. In this paper, we investigate the production of a pair of charged top-pions associated with Z gauge boson at the International Linear Collider (ILC), i.e. [Formula: see text] and [Formula: see text]. We calculate the production rate of the process [Formula: see text] and present the distributions of the transverse momenta of Z gauge boson and charged top-pion [Formula: see text]. We find that the cross-section of the process [Formula: see text] can reach 1 fb with reasonable parameter space of the TC2 model. Considering the main decay mode of charged top-pion, we find that such a production may provide copious events. While the cross-section of the process [Formula: see text] is below 1 fb, hence the process [Formula: see text] will play an important role in the test of the TC2 model at the ILC when compared with the process [Formula: see text].