TY - JOUR
T1 - Measurements of top quark spin observables in \(t\overline{t}\) events using dilepton final states in \(\sqrt{s}\) = 8 TeV \(pp\) collisions with the ATLAS detector
T2 - Journal of High Energy Physics
N2 - Measurements of top quark spin observables in \(t\overline{t}\) events are presented based on 20.2 fb\(^{−1}\) of \(\sqrt{s}\) = 8 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 \(t\overline{t}\) 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.
KW - High energy physics
KW - Hadron-Hadron scattering (experiments)
Y1 - 2017
UR - https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/17350
UR - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-173505
VL - 2017
IS - 03
ER -