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T: Fachverband Teilchenphysik

T 18: Top: tt Wirkungsquerschnitt, tt Modelling, tt+bb, t→Ws

T 18.5: Vortrag

Montag, 9. März 2015, 15:00–15:15, K.11.10 (K8)

Comparison of Monte-Carlo generator predictions for gap fraction and jet multiplicity observables in tt events — Nello Bruscino, Markus Cristinziani, Mazuza Ghneimat, Sebastian Heer, Vadim Kostyukhin, Evan Machefer, •Liza Mijović, and Kaven Yau Wong — Physikalisches Institut, Universität Bonn

Predictions from several Monte-Carlo generators are compared for the tt production. The predictions are also compared to the data taken by ATLAS in 2011 at √s=7 TeV. The focus is on observables sensitive to additional parton radiation: jet multiplicities and gap fraction observables. Generators that have been used for ATLAS analyses of the data collected in the first LHC proton physics run as well as new generators that will be used in the upcoming LHC run are included. The goal of the work is to collect information and studies for discussions between the communities of the ATLAS and CMS experiments and colleagues from theory.