Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 15: Top Quark I (Ladungsasymmetrie, Spin)
T 15.3: Vortrag
Montag, 29. Februar 2016, 11:30–11:45, VMP9 HS
Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at 8 TeV with the ATLAS detector — •Roger Naranjo1, Cecile Deterre1, Yvonne Peters1,2, James Howarth1, and Ralph Schäfer1 — 1DESY, Hamburg, Germany, — 2University of Manchester, Manchester. UK.
Measurements of the top-antitop quarks charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of 20.3 fb−1 from pp collisions at a center of mass energy of 8 TeV collected by the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the mass, transverse momentum and boost of the tt system are performed both in the full phase-space and also in a fiducial phase-space closely matching the detector acceptance. Two observables are studied: ACℓ ℓ based on the selected leptons and ACtt based on the reconstructed tt final state. The measurements are consistent with the Standard Model predictions.