# An anomalous Wtb coupling at a linear collider

Source: [An anomalous Wtb coupling at a linear collider](<https://www.sota2.com/research/paper/68fa263e2c2a3760193b8120>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T11:14:47.912Z

Authors: K. Kolodziej

Published: 2003-12-12T14:40:41.000Z

## Abstract

Differential cross sections of secondary particles in a process of top quark pair production and decay into six fermions at a linear collider with an unpolarized and a longitudinally polarized electron beam are computed to the lowest order in the standard model and in the presence of an anomalous Wtb coupling. It is illustrated that the latter has a little impact on the differential cross sections. In particular, it is shown that the angular distribution of a secondary lepton receives practically no contribution from the anomalous Wtb coupling, even if the top quark is produced off shell and the non-double resonance background contributions are taken into account. This finding is in accordance with the decoupling theorem that has been proven in literature in the narrow top quark width approximation.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ph/0312168>)

[PDF](<https://arxiv.org/pdf/hep-ph/0312168.pdf>)