Top-quark couplings to TeV resonances at future lepton colliders
2001
Abstract We study the processes W L W L →t t and W L Z L →t b ( t b) at future lepton colliders as probes of the couplings of the top quark to resonances at the TeV scale. We consider the cases in which the dominant low energy feature of a strongly interacting electroweak symmetry breaking sector is either a scalar or a vector resonance with mass near 1 TeV. We find that future lepton colliders with high energy and high luminosity have great potential to sensitively probe these physics scenarios. In particular, at a 1.5 TeV linear collider with an integrated luminosity of 200 fb −1 , we expect about 120 events for either a scalar or a vector to decay to t t , tb . Their leading partial decay widths, which characterize the coupling strengths, can be statistically determined to about 10% level.
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