Non-universal gauge boson $Z'$ and the spin correlation of top quark pair production at $e^{-}e^{+}$ colliders

Details Non-universal gauge boson $Z'$ and the spin correlation of top quark pair production at $e^{-}e^{+}$ colliders Non-universal gauge boson $Z'$ and the spin correlation of top quark pair production at $e^{-}e^{+}$ colliders

2006-12-05

arxiv.org/abs/hep-ph/0612036v1

J.Phys.G34:139-150,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures

Scientific paper

10.1088/0954-3899/34/1/010

In the off-diagonal basis, we discuss the contributions of the non-universal gauge boson $Z'$ predicted by the topcolor-assisted technicolor ($TC2$) model to the spin configurations and the spin correlation observable of the top quark pair production via the process $e^{-}e^{+}\to t\bar{t}$. Our numerical results show that the production cross sections for the like-spin states, which vanish in the standard model, can be significantly large as $M_{Z'}\approx \sqrt{S}$. With reasonable values of the $Z'$ mass $M_{Z'}$ and the coupling parameter $k_{1}$, $Z'$ exchange can generate large corrections to the spin correlation observable.

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