Probing Top-Quark Couplings at Polarized NLC
Abstract
The energy spectrum of the lepton(s) in e+e- --> tt-bar --> l+- ...../l+l-..... at next linear colliders (NLC) is studied for arbitrary longitudinal beam polarizations as a possible test of new physics in top-quark couplings. The most general non-standard couplings for gamma-tt-bar, Ztt-bar and Wtb vertices are considered. Expected precision of the non-standard-parameter determination is estimated applying the optimal-observable procedure.
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