Measurement of the tt-bar production cross section in pp-bar collisions at [sqrt]s=1.96 TeV using soft electron b-tagging
Author(s)Paus, Christoph M. E.; Bauer, Gerry P.; Choudalakis, Georgios; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Henderson, C.; Knuteson, Bruce O.; Makhoul, K.; Xie, Si; ... Show more Show less
Measurement of the tt̅ production cross section in pp̅ collisions at √s=1.96 TeV using soft electron b-tagging
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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.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review D
American Physical Society
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.
Final published version