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Search for Anomalous Wtb Couplings in Single Top Quark Production
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University.
2008 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 101, no 22, 221801- p.Article in journal (Refereed) Published
Abstract [en]

In 0.9 fb(-1) of pp collisions, the D0 Collaboration presented evidence for single top quark production in events with an isolated lepton, missing transverse momentum, and two to four jets. We examine these data to study the Lorentz structure of the Wtb coupling. The standard model predicts a left-handed vector coupling at the Wtb vertex. The most general lowest dimension, CP-conserving Lagrangian admits right-handed vector and left- or right-handed tensor couplings as well. We find that the data prefer the left-handed vector coupling and set upper limits on the anomalous couplings. These are the first direct constraints on a general Wtb interaction and the first direct limits on left- and right-handed tensor couplings.

Place, publisher, year, edition, pages
2008. Vol. 101, no 22, 221801- p.
Keyword [en]
standard-model, gauge bosons, tevatron, events
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-57727DOI: 10.1103/PhysRevLett.101.221801ISI: 000261214400012OAI: oai:DiVA.org:su-57727DiVA: diva2:418276
Note
authorCount :525Available from: 2011-05-20 Created: 2011-05-16 Last updated: 2017-12-11Bibliographically approved

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