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
2009 (English)In: Physical Review D, ISSN 1550-7998, Vol. 80, no 7, 071102- p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:kth:diva-72078DOI: 10.1103/PhysRevD.80.071102ISI: 000271353400002OAI: oai:DiVA.org:kth-72078DiVA: diva2:487642
QC 201201312012-01-312012-01-312012-01-31Bibliographically approved