Measurements of top-quark pair differential cross-sections in the eμ channel in pp collisions at √s=13 TeV using the ATLAS detector. / The ATLAS Collaboration ; Boisvert, Veronique.

In: European Physical Journal C: Particles and Fields, Vol. 77, 292, 05.2017, p. 1-30.

Research output: Contribution to journalArticle

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Abstract

This article presents measurements of tt¯ differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb-1 of proton–proton data at a centre-of-mass energy of √s=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¯ system. The 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¯ system.
Original languageEnglish
Article number292
Pages (from-to)1-30
Number of pages30
JournalEuropean Physical Journal C: Particles and Fields
Volume77
Early online date8 May 2017
DOIs
Publication statusPublished - May 2017
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 28167591