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Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings

Abazov, VM; Abbott, B; Abolins, M; Acharya, BS; Adams, M; Adams, T; Aguilo, E; ... Zverev, EG; + view all (2007) Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings. Physical Review Letters , 99 (19) , Article 191802. 10.1103/PhysRevLett.99.191802. Green open access

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Abstract

We search for the production of single top quarks via flavor-changing-neutral-current couplings of a gluon to the top quark and a charm (c) or up (u) quark. We analyze 230  pb-1 of lepton+jets data from pp̅ collisions at a center of mass energy of 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. We observe no significant deviation from standard model predictions, and hence set upper limits on the anomalous coupling parameters κgc/Λ and κgu/Λ, where κg define the strength of tcg and tug couplings, and Λ defines the scale of new physics. The limits at 95% C.L. are κgc/Λ<0.15  TeV-1 and κgu/Λ<0.037  TeV-1.

Type: Article
Title: Search for production of single top quarks via tcg and tug flavor-changing-neutral-current couplings
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.99.191802
Publisher version: http://dx.doi.org/PhysRevLett.99.191802
Language: English
Additional information: © 2007 The American Physical Society
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Cell and Developmental Biology
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/1374307
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