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https://hdl.handle.net/10316/108169
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: | Santos, S. P. Amor dos Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Data: | 2017 | Editora: | Springer Nature | Título da revista, periódico, livro ou evento: | European Physical Journal C | Volume: | 77 | Número: | 11 | Resumo: | This paper presents single lepton and dilepton kinematic distributions measured in dileptonic t ¯t events produced in 20.2 fb−1 of √ s = 8TeV 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 btagged 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 mpole t = 173.2±0.9±0.8±1.2GeV, where the three uncertainties arise from data statistics, experimental systematics, and theoretical sources. | URI: | https://hdl.handle.net/10316/108169 | DOI: | 10.1140/epjc/s10052-017-5349-9 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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Ficheiro | Descrição | Tamanho | Formato | |
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Measurement-of-lepton-differential-distributions-and-the-top-quark-mass-in-tt-production-in-pp-collisions-at-s8-TeV-with-the-ATLAS-detectorEuropean-Physical-Journal-C.pdf | 3.15 MB | Adobe PDF | Ver/Abrir |
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