This paper presents single lepton and dilepton kinematic distributions measured in dileptonic tt¯ events produced in 20.2fb - 1 of s=8 TeV pp collisions recorded by the ATLAS experiment at the LHC. Both absolute and normalised differential cross-sections are measured, using events with an opposite-charge eμ pair and one or two b-tagged jets. The cross-sections are measured in a fiducial region corresponding to the detector acceptance for leptons, and are compared to the predictions from a variety of Monte Carlo event generators, as well as fixed-order QCD calculations, exploring the sensitivity of the cross-sections to the gluon parton distribution function. Some of the distributions are also sensitive to the top quark pole mass; a combined fit of NLO fixed-order predictions to all the measured distributions yields a top quark mass value of mtpole=173.2±0.9±0.8±1.2 GeV, where the three uncertainties arise from data statistics, experimental systematics, and theoretical sources. © 2017, CERN for the benefit of the ATLAS collaboration.
Documento: | Artículo |
Título: | Measurement of lepton differential distributions and the top quark mass in tt¯ production in pp collisions at √s=8 TeV with the ATLAS detector |
Autor: | Aaboud, M. et al. Este artículo contiene 2900 autores, consultelos en el artículo en formato pdf. |
Filiación: | Este artículo contiene 2900 autores con sus filiaciones, consultelas en el artículo en formato pdf. |
Año: | 2017 |
Volumen: | 77 |
Número: | 11 |
DOI: | http://dx.doi.org/10.1140/epjc/s10052-017-5349-9 |
Título revista: | European Physical Journal C |
Título revista abreviado: | Eur. Phys. J. C |
ISSN: | 14346044 |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v77_n11_p_Aaboud |