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Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/264647
Title: Differential top-antitop cross-section measurements as a function of observables constructed from final-state particles using pp collisions at √s = 7 TeV in the ATLAS detector
Authors: Hrynevich, A.
ATLAS collaboration
Keywords: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Issue Date: 2015
Publisher: Springer Verlag
Citation: J High Energy Phys 2015;2015(6).
Abstract: Various differential cross-sections are measured in top-quark pair (tt) events produced in proton-proton collisions at a centre-of-mass energy of √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.
URI: https://elib.bsu.by/handle/123456789/264647
Scopus: 10.1007/JHEP06(2015)100
metadata.dc.identifier.scopus: 84978023942
Appears in Collections:Статьи НИУ «Институт ядерных проблем»

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