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Probing neutral top-pion via a flavor-changing process $γγ\to t\bar{c}Π_{t}^{0}$

Xuelei Wang·Bingzhong Li·Yueling Yang
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Abstract

In the framework of topcolor-assisted-technicolor model(TC2), we study a flavor-changing neutral top-pion production process $γγ\to t\bar{c}Π_{t}^{0}$. The study shows that there exists a resonance effect which can enhance the cross section up to a few fb even tens fb. For a yearly luminosity 100 $fb^{-1}$ at future linear colliders, there might be hundreds even thousands events to be produced. On the other hand, the background of such flavor-changing process is very clean due to the GIM mechanism in SM . With such sufficient events and clean background, neutral toppion could be detected at future linear colliders with high center of energy and luminosity. Our study provides a possible way to test TC2 model.

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Xuelei Wang, Bingzhong Li, Yueling Yang. 2003-10-26. Probing neutral top-pion via a flavor-changing process $γγ\to t\bar{c}Π_{t}^{0}$. https://doi.org/10.1103/physrevd.68.115003

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