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

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 $\ppbar$ 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 $\kappacLambda$ and $\kappauLambda$, where $\kappag$ define the strength of $tcg$ and $tug$ couplings, and $\Lambda$ defines the scale of new physics. The limits at 95% C.L. are: $\kappacLambda < 0.15 \rm TeV^{-1}$ and $\kappauLambda < 0.037 \rm TeV^{-1}$.

7 pages, 5 figures; updated (published) version of hep-ex/0702005

References in corpus (3)

• Evidence for production of single top quarks and first direct measurement of |Vtb|
• Multivariate searches for single top quark production with the D0 detector
• The Constraint on FCNC Coupling of the Top Quark with a Gluon from ep Collisions

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• Review of Properties of the Top Quark from Measurements at the Tevatron
• Signatures of NP models in top FCNC decay t --> c(u) l+ l-
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• The Constraint on FCNC Coupling of the Top Quark with a Gluon from ep Collisions
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• Study of anomalous top quark FCNC interactions via $tW$-channel of single top
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• R parity violating supersymmetric explanation for the CDF Wjj excess
• Flavour-changing top quark decays in the alternative left-right model
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