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Measurements of single top quark production cross sections and vertical bar V(tb)vertical bar in p(p)over-bar collisions at root s=1.96 TeV
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
2011 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 84, no 11, 112001- p.Article in journal (Refereed) Published
Abstract [en]

We present measurements of production cross sections of single top quarks in p (p) over bar collisions at root s = 1.96 TeV in a data sample corresponding to an integrated luminosity of 5.4 fb(-1) collected by the D0 detector at the Fermilab Tevatron Collider. We select events with an isolated electron or muon, an imbalance in transverse energy, and two, three, or four jets, with one or two of them containing a bottom hadron. We obtain an inclusive cross section of sigma(p (p) over bar -> tb + X, tqb + X) = 3.43(-0.74)(+0.73) pb and use it to extract the CKM matrix element 0.79 < vertical bar V(tb)vertical bar <= 1 at the 95% C.L. We also measure sigma(p<(p)over bar> -> tb + X) = 0.68(-0.35)(+0.38) pb and sigma(p (p) over bar -> tqb + X) = 2.86(-0.63)(+0.69) pb when assuming, respectively, tqb and tb production rates as predicted by the standard model.

Place, publisher, year, edition, pages
2011. Vol. 84, no 11, 112001- p.
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-65782DOI: 10.1103/PhysRevD.84.112001ISI: 000297769600001OAI: oai:DiVA.org:su-65782DiVA: diva2:464709
Projects
D0
Funder
Swedish Research Council
Note
Publikationen har totalt 423 författare, V. Abazov et al.Available from: 2011-12-13 Created: 2011-12-13 Last updated: 2017-12-08Bibliographically approved

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