新的规范玻色子Z′对顶夸克对产生的自旋修正

New Gauge Boson and the Spin Correction of Top Quark Pair Production

在非对角基下,我们研究了SU(3)简单群模型中预言的新的中性规范玻色子Z′对顶夸克对在直线对撞机上产生的自旋相关过程的修正。结果表明Z′的改变可以对t↑-t↓和t↓-t↑散射截面产生主要修正。标准模型中顶夸克对产生的散射截面在相同自旋态下为零,然而在非对角基下由于Z′的交换是不为零的,并且当MZ′≈s时有重要的贡献。因此我们希望,Z′对顶夸克对产生的自旋结构的贡献可以在未来的ILC实验上探测到。

In the off - diagonal basis, we study the spin correction of the top quark pair production via the process e ^＋e^→tt at the high energy linear e ^＋e^- collider （ILC） in the context of the SU （3） simple group model. Our numerical results show that the gauge boson exchange can generate significant corrections to the differential cross sections for the t↑t↓ and t↓t ↑ states. The production cross - section for the like - spin states, which vanish in the standard model, can be significantly large as Mz＇≈√s . We expect that the effects of the new gauge boson Z＇ on the spin configurations of the top quark pair production might be observed in future ILC experiments.