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Measurement of the t <span style='text-decoration: overline'></span>t production cross-section in p <span style='text-decoration: overline'>p</span> collisions using dilepton events}.

Abazov, V. M. and Bertram, Iain and Borissov, Guennadi and Fox, Harald and Ratoff, Peter and Sopczak, Andre (2007) Measurement of the t <span style='text-decoration: overline'></span>t production cross-section in p <span style='text-decoration: overline'>p</span> collisions using dilepton events}. Physical Review D, 76. 052006. ISSN 1550-7998

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Abstract

We present a measurement of the t[overline t] pair production cross section in p[overline p] collisions at sqrt(s)=1.96 TeV utilizing approximately 425 pb-1 of data collected with the D0 detector. We consider decay channels containing two high pT charged leptons (either e or µ) from leptonic decays of both top-daughter W bosons. These were gathered using four sets of selection criteria, three of which required that a pair of fully identified leptons (i.e., eµ, ee, or µµ) be found. The fourth approach imposed less restrictive criteria on one of the lepton candidates and required that at least one hadronic jet in each event be tagged as containing a b quark. For a top quark mass of 175 GeV, the measured cross section is 7.4±1.4(stat)±1.0(syst) pb and for the current Tevatron average top quark mass of 170.9 GeV, the resulting value of the cross section is 7.8±1.8(stat+syst) pb.

Item Type: Article
Journal or Publication Title: Physical Review D
Uncontrolled Keywords: elementary particle jets ; high-energy elementary particle interactions ; intermediate boson decay ; leptonic decays ; proton-proton inclusive interactions ; quark mass ; quark production ; W bosons
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 11241
Deposited By: Dr Iain Bertram
Deposited On: 12 Aug 2008 16:48
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 14:58
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/11241

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