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Measurement of $t\bar{t}$ Production in the $\tau+$jets Channel Using $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
2010 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 82, no 7, 071102- p.Article in journal (Refereed) Published
Abstract [en]

We present a measurement of the tt̅ production cross section multiplied by the branching ratio to tau lepton decaying semihadronically (τh) plus jets, σ(pp̅ →tt̅ +X)·BR(tt̅ →τh+jets), at a center of mass energy √s=1.96  TeV using 1  fb-1 of integrated luminosity collected with the D0 detector. Assuming a top quark mass of 170 GeV, we measure σtt̅ ·BRτh+j=0.60-0.22+0.23(stat)-0.14+0.15(syst)±0.04(lumi)  pb. In addition, we extract the tt̅ production cross section using the tt̅ →τh+jets topology, with the result σtt̅ =6.9-1.2+1.2(stat)-0.7+0.8(syst)±0.4(lumi)  pb. These findings are in good agreement with standard model predictions and measurements performed using other top quark decay channels.

Place, publisher, year, edition, pages
2010. Vol. 82, no 7, 071102- p.
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-47326DOI: 10.1103/PhysRevD.82.071102OAI: oai:DiVA.org:su-47326DiVA: diva2:373644
Projects
D0
Funder
Swedish Research Council
Note
433Available from: 2010-12-01 Created: 2010-12-01 Last updated: 2017-12-12Bibliographically approved

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