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

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Aaboud, M; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; AbouZeid, OS; Abraham, NL; Abramowicz, H; ...Date
2017-05-08Source Title
European Physical Journal C: Particles and FieldsPublisher
SPRINGERUniversity of Melbourne Author/s
Rados, Pere; Nuti, Francesco; Milesi, Marco; Barberio, Luigia; Kubota, Takashi; ZANZI, DANIELE; Taylor, Geoffrey; Urquijo, Phillip; Dawe, Edmund; Scutti, Federico; ...Affiliation
School of PhysicsMetadata
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Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., Aben, R., AbouZeid, O. S., Abraham, N. L., Abramowicz, H., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adams, D. L., Adelman, J., Adomeit, S. ,... Zwalinski, L. (2017). Measurements of top-quark pair differential cross-sections in the e mu channel in pp collisions at root s=13 TeV using the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 77 (5), https://doi.org/10.1140/epjc/s10052-017-4821-x.Access Status
Open AccessAbstract
This article presents measurements of [Formula: see text] differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb[Formula: see text] of proton-proton data at a centre-of-mass energy of [Formula: see text] 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 [Formula: see text] system. The [Formula: see text] 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 [Formula: see text] Herwig++ predictions, which differ significantly from the data in both the transverse momentum of the top quark and the mass of the [Formula: see text] system.
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