Measurement of the tt-bar production cross section in pp-bar collisions at [sqrt]s=1.96 TeV using soft electron b-tagging
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Aaltonen-2010-Measurement of the t.pdf
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Author(s)
Paus, Christoph M. E.
Choudalakis, Georgios
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Hahn, Kristian Allan
Henderson, C.
Knuteson, Bruce O.
Xie, Si
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Measurement of the tt̅ production cross section in pp̅ collisions at √s=1.96 TeV using soft electron b-tagging
Date Issued
May 2010
Journal
Physical Review D
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Measurement of the tt-bar production cross section in pp-bar collisions at s=1.96 TeV using soft electron b-tagging.” Physical Review D 81.9 (2010): 092002. © 2010 The American Physical Society.
Version
Final published version
Abstract
We present a measurement of the top-quark pair-production cross section in pp̅ collisions at [sqrt]s=1.96 TeV using a data sample corresponding to 1.7 fb-1 of integrated luminosity collected with the Collider Detector at Fermilab. We reconstruct tt̅ events in the lepton+jets channel, consisting of eν+jets and μν+jets final states. The dominant background is the production of W bosons in association with multiple jets. To suppress this background, we identify electrons from the semileptonic decay of heavy-flavor jets (“soft electron tags”). From a sample of 2196 candidate events, we obtain 120 tagged events with a background expectation of 51±3 events, corresponding to a cross section of σtt̅ =7.8±2.4(stat)±1.6(syst)±0.5(lumi) pb. We assume a top-quark mass of 175 GeV/c2. This is the first measurement of the tt̅ cross section with soft electron tags in run II of the Tevatron.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.092002
