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First measurement of the cross section for top-quark pair production in proton-proton collisions at √s = 7 TeV


CMS Collaboration; Chiochia, V; Amsler, C; Favaro, C; Verzetti, M; Snoek, H; Aguiló, E; Schmitt, A; De Visscher, S; Millan, B; Otyugova, P; Ivova, M; Storey, J (2011). First measurement of the cross section for top-quark pair production in proton-proton collisions at √s = 7 TeV. Physics Letters B, 695(5):424-443.

Abstract

The first measurement of the cross section for top-quark pair production in pp collisions at the LHC at center-of-mass energy sqrt(s)= 7 TeV has been performed using 3.1 {\pm} 0.3 inverse pb of data recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from Drell-Yan and non-W/Z boson production are estimated from data. Eleven events are observed in the data with 2.1 {\pm} 1.0 events expected from background. The measured cross section is 194 {\pm} 72 (stat.) {\pm} 24 (syst.) {\pm} 21 (lumi.) pb, consistent with next-to-leading order predictions.

The first measurement of the cross section for top-quark pair production in pp collisions at the LHC at center-of-mass energy sqrt(s)= 7 TeV has been performed using 3.1 {\pm} 0.3 inverse pb of data recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from Drell-Yan and non-W/Z boson production are estimated from data. Eleven events are observed in the data with 2.1 {\pm} 1.0 events expected from background. The measured cross section is 194 {\pm} 72 (stat.) {\pm} 24 (syst.) {\pm} 21 (lumi.) pb, consistent with next-to-leading order predictions.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2011
Deposited On:13 Feb 2012 09:33
Last Modified:05 Apr 2016 15:36
Publisher:Elsevier
ISSN:0370-2693
Publisher DOI:10.1016/j.physletb.2010.11.058
Related URLs:http://arxiv.org/abs/1010.5994
Permanent URL: http://doi.org/10.5167/uzh-58822

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