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Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel
Cern.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0003-3867-0336
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-8913-0981
Vise andre og tillknytning
Rekke forfattare: 30052012 (engelsk)Inngår i: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 711, nr 3-4, s. 244-263Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2012. Vol. 711, nr 3-4, s. 244-263
Emneord [en]
High-energy collider experiment, Cross-section, Top physics
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-84581DOI: 10.1016/j.physletb.2012.03.083ISI: 000304236400004Scopus ID: 2-s2.0-84860257925OAI: oai:DiVA.org:kth-84581DiVA, id: diva2:499365
Merknad
QC 20120619. Author count: 3005.Tilgjengelig fra: 2012-02-13 Laget: 2012-02-13 Sist oppdatert: 2019-12-04bibliografisk kontrollert

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