Next-to-leading-order predictions for t-channel single-top production at hadron colliders

Campbell, J., Frederix, R., Maltoni, F. and Tramontano, F. (2009) Next-to-leading-order predictions for t-channel single-top production at hadron colliders. Physical Review Letters, 102(18), (doi: 10.1103/PhysRevLett.102.182003) (PMID:19518862)

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We present the predictions at next-to-leading order (NLO) in the strong coupling for the single-top cross section in the t channel at the Tevatron and the LHC. Our calculation starts from the 2→3 Born amplitude gq→tb̅ q′, keeping the b-quark mass nonzero. A comparison is performed with a traditional NLO calculation of this channel based on the 2→2 Born process with a bottom quark in the initial state. In particular, the effect of using kinematic approximations and resumming logarithms of the form log(Q<sup>2</sup>/mb<sup>2</sup>) in the 2→2 process is assessed. Our results show that the 2→3 calculation is very well behaved and in substantial agreement with the predictions based on the 2→2 process.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Campbell, Dr John
Authors: Campbell, J., Frederix, R., Maltoni, F., and Tramontano, F.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
481951Investigations in Quantum Chromodynamics and Physics Beyond the Standard ModelChristine DaviesScience & Technologies Facilities Council (STFC)ST/G00059X/1Physics and Astronomy