Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW LETTERS 102, 092002 (2009). Copyright © 2009 The American Physical Society. Used by permission.


Anomalous Wtb couplings modify the angular correlations of the top-quark decay products and change the single top-quark production cross section. We present limits on anomalous top-quark couplings by combining information from W boson helicity measurements in top-quark decays and anomalous coupling searches in the single top-quark final state. We set limits on right-handed vector couplings as well as left-handed and right-handed tensor couplings based on about 1 fb-1 of data collected by the D0 experiment.

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