Probing anomalous top quark couplings at eγcolliders

Details Probing anomalous top quark couplings at eγcolliders Probing anomalous top quark couplings at eγcolliders

1998-04-21

arxiv.org/abs/hep-ph/9804343v2

Phys.Rev. D58 (1998) 094004

Physics

High Energy Physics

High Energy Physics - Phenomenology

version in PRD, refs added

Scientific paper

10.1103/PhysRevD.58.094004

We study in the effective Lagrangian approach the possibility of probing anomalous top quark charged current couplings in the single top production at a high energy e\gamma collider. We analyzed all possible dimension-six CP-conserving operators which can give rise to an anomalous Wtb coupling which represent new physics effect generated at a higher energy scale. For those operators which also give rise to anomalous Zbb_bar or right-handed Wtb couplings, we find that they are strongly constrained by the existing R_b and b->s\gamma data. As a result, a collider with a luminosity of the order of 100 fb^{-1} is required to observe the anomalous effects. For other operators which currently subject to no strong constraints, the high energy e\gamma collider can probe their couplings effectively because of the clean environment of such a collider.

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