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Measurements of top quark spin observables in ... events using dilepton final states in ... TeV pp collisions with the ATLAS detector
Ist Teil von
The journal of high energy physics, 2017-03, Vol.2017 (3), p.1-50
Erscheinungsjahr
2017
Link zum Volltext
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).Measurements of top quark spin observables in ... events are presented based on 20.2 fb super(-1) of ... TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables, each sensitive to a different coefficient of the spin density matrix of ... production, which are measured independently. Ten of these observables are measured for the first time. All of them are corrected for detector resolution and acceptance effects back to the parton and stable-particle levels. The measured values of the observables at parton level are compared to Standard Model predictions at next-to-leading order in QCD. The corrected distributions at stable-particle level are presented and the means of the distributions are compared to Monte Carlo predictions. No significant deviation from the Standard Model is observed for any observable. [Figure not available: see fulltext.]