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Differential top-antitop cross-section measurements as a function of observables constructed from final-state particles using pp collisions at root s=7 TeV in the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0003-3867-0336
Vise andre og tillknytning
Rekke forfattare: 28792015 (engelsk)Inngår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, nr 6, artikkel-id UNSP 100Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Various differential cross-sections are measured in top-quark pair (t (t) over bar) events produced in proton-proton collisions at a centre-of-mass energy of root s = 7 TeV at the LHC with the ATLAS detector. These differential cross-sections are presented in a data set corresponding to an integrated luminosity of 4.6 fb(-1). The differential cross-sections are presented in terms of kinematic variables, such as momentum, rapidity and invariant mass, of a top-quark proxy referred to as the pseudo-top-quark as well as the pseudo-top-quark pair system. The dependence of the measurement on theoretical models is minimal. The measurements are performed on tt events in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of them tagged as originating from a b-quark. The hadronic and leptonic pseudo-top-quarks are defined via the leptonic or hadronic decay mode of the W boson produced by the top-quark decay in events with a single charged lepton. Differential cross-section measurements of the pseudo-top-quark variables are compared with several Monte Carlo models that implement next-to-leading order or leading-order multi-leg matrix-element calculations.

sted, utgiver, år, opplag, sider
Springer-Verlag New York, 2015. nr 6, artikkel-id UNSP 100
Emneord [en]
Hadron-Hadron Scattering, Top physics
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-171206DOI: 10.1007/JHEP06(2015)100ISI: 000356797600001Scopus ID: 2-s2.0-84978023942OAI: oai:DiVA.org:kth-171206DiVA, id: diva2:842566
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QC 20150721

Tilgjengelig fra: 2015-07-21 Laget: 2015-07-21 Sist oppdatert: 2019-12-04bibliografisk kontrollert

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Jovicevic, JelenaKuwertz, EmmaLund-Jensen, BengtMorley, AnthonyStrandberg, Jonas
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Journal of High Energy Physics (JHEP)

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