Measurement of the tt production cross section in pp collisions at {radical}(s)=1.96 TeV using soft electron b-tagging

Journal Article · Sat May 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.092002· OSTI ID:21409913

Aaltonen, T; Maki, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; Remortel, N van ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Grosso-Pilcher, C; Ketchum, W; Kim, Y K; Krop, D; Kwang, S; Lee, H S; Paramonov, A A; Schmidt, M A; Shiraishi, S; Shochet, M ^[2]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

We present a measurement of the top-quark pair-production cross section in pp collisions at {radical}(s)=1.96 TeV using a data sample corresponding to 1.7 fb{sup -1} of integrated luminosity collected with the Collider Detector at Fermilab. We reconstruct tt events in the lepton+jets channel, consisting of e{nu}+jets and {mu}{nu}+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 {sigma}{sub tt}=7.8{+-}2.4(stat){+-}1.6(syst){+-}0.5(lumi) pb. We assume a top-quark mass of 175 GeV/c{sup 2}. This is the first measurement of the tt cross section with soft electron tags in run II of the Tevatron.

• OSTI ID: 21409913
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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CROSS SECTIONS
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TEV RANGE 01-10
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