Effects of Top-Quark Anomalous Decay Couplings at γγColliders
Kazumasa Ohkuma
Abstract
Most general tbW couplings were investigated in the process γγ-> ttbar -> l+- X for unpolarized photon beams. The double angular and energy distribution of the lepton was calculated and an optimal-observable analysis on it was carried out for the SM ttbar production mechanism. It was also shown that the leptonic angular distribution is insensitive to non-standard tbW vertex. That means that observation of non-standard effects indicates existence of some new physics in the production part.
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