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https://hdl.handle.net/10316/108170
Title: | Measurements of top-quark pair differential cross-sections in the eμ channel in pp collisions at √s=13 TeV using the ATLAS detector | Authors: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Issue Date: | 2017 | Publisher: | Springer Nature | Serial title, monograph or event: | European Physical Journal C | Volume: | 77 | Issue: | 5 | Abstract: | This article presents measurements of t ¯t 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 crosssections 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 t ¯t system. The t ¯t events are selected by requiring one electron and onemuonof 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 t ¯t system. | URI: | https://hdl.handle.net/10316/108170 | DOI: | 10.1140/epjc/s10052-017-4821-x | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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Measurements-of-topquark-pair-differential-crosssections-in-the-e-channel-in-pp-collisions-at-s13-TeV-using-the-ATLAS-detectorEuropean-Physical-Journal-C.pdf | 2.31 MB | Adobe PDF | View/Open |
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