Measurements of top-quark pair differential cross-sections in the e μ channel in pp collisions at √ s = 13 TeV using the ATLAS detector

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Aaboud, M.

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Measurements of top-quark pair differential cross-sections in the e μ channel in pp collisions at √ s = 13 TeV using the ATLAS detector	2 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1140/epjc/s10052-017-4821-x

Title: Measurements of top-quark pair differential cross-sections in the e μ channel in pp collisions at √ s = 13 TeV using the ATLAS detector
Creator: Aaboud, M.
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Abbott, B.
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Chelkov, G. A.
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Aad, G.
Date: 2017
DOI: 10.1140/epjc/s10052-017-4821-x
Description: This article presents measurements of tt¯tt¯ differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb−1−1 of proton–proton data at a centre-of-mass energy of s√=13s=13 TeV recorded by the ATLAS experiment at the LHC in 2015. Differential cross-sections are measured as a function of the transverse momentum and absolute rapidity of the top quark, and of the transverse momentum, absolute rapidity and invariant mass of the tt¯tt¯ system. The tt¯tt¯ events are selected by requiring one electron and one muon of opposite electric charge, and at least two jets, one of which must be tagged as containing a b-hadron. The measured differential cross-sections are compared to predictions of next-to-leading order generators matched to parton showers and the measurements are found to be consistent with all models within the experimental uncertainties with the exception of the Powheg-Box++ Herwig++ predictions, which differ significantly from the data in both the transverse momentum of the top quark and the mass of the tt¯tt¯ system.

Created: 03-10-2017

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Радиофизический факультет Measurements of top-quark pair differential cross-sections in the e μ channel in pp collisions at √ s = 13 TeV using the ATLAS detector