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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, p. 071102-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, p. 071102-
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, id: 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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