Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

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 Peters^1,2, 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: A_C^{ℓ ℓ} based on the selected leptons and A_C^tt based on the reconstructed tt final state. The measurements are consistent with the Standard Model predictions.