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Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 3005
2012 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 711, no 3-4, 244-263 p.Article in journal (Refereed) Published
Abstract [en]

A measurement of the production cross-section for top quark pairs (t (t) over bar) in pp collisions at root s = 7 TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35 pb(-1), two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables to obtain cross-section measurements of sigma(t (t) over bar) = 187 +/- 11(stat.)(-17)(+18)(syst.) +/- 6(lumi.) pb and sigma(t (t) over bar) = 173 +/- 17(stat.)(-16)(+18)(syst.) +/- 6(lumi.) pb respectively. The two measurements are in agreement with each other and with QCD calculations. The first measurement has a better a priori sensitivity and constitutes the main result of this Letter.

Place, publisher, year, edition, pages
2012. Vol. 711, no 3-4, 244-263 p.
Keyword [en]
High-energy collider experiment, Cross-section, Top physics
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-84581DOI: 10.1016/j.physletb.2012.03.083ISI: 000304236400004ScopusID: 2-s2.0-84860257925OAI: diva2:499365
QC 20120619. Author count: 3005.Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-06-19Bibliographically approved

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Lafaye, RemiLund-Jensen, BengtStrandberg, Jonas
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