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Combination of t(t)over-bar cross section measurements and constraints on the mass of the top quark and its decays into charged Higgs bosons
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2009 (English)In: Physical Review D, ISSN 1550-7998, Vol. 80, no 7, 071102- p.Article in journal (Refereed) Published
Abstract [en]

We combine measurements of the top quark pair production cross section in p (p) over bar collisions in the l + jets, ll, and tau l final states ( where l is an electron or muon) at a center of mass energy of root s = 1.96 TeV in 1 fb(-1) of data collected with the D0 detector. For a top quark mass of 170 GeV/c(2), we obtain sigma(t (t) over bar) = 8.18(-0.87)(+0.98) pb in agreement with the theoretical prediction. Based on predictions from higher order quantum chromodynamics, we extract a mass for the top quark from the combined t (t) over bar cross section, consistent with the world average of the top quark mass. In addition, the ratios of t (t) over bar cross sections in different final states are used to set upper limits on the branching fractions B(t -> H(+)b -> tau(+) vb) and B(t -> H(+)b -> c (s) over barb) as a function of the charged Higgs boson mass.

Place, publisher, year, edition, pages
2009. Vol. 80, no 7, 071102- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-127430DOI: 10.1103/PhysRevD.80.071102ISI: 000271353400002OAI: oai:DiVA.org:uu-127430DiVA: diva2:330558
Available from: 2010-07-16 Created: 2010-07-13 Last updated: 2011-01-03Bibliographically approved

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Uppsala UniversityDepartment of Physics and Astronomy
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