10-17 July 2019
Ghent
Europe/Brussels timezone

Measurement of ttbar with additional jets with the ATLAS detector

12 Jul 2019, 10:00
15m
Campus Ledeganck - Aud. 3 (Ghent)

Campus Ledeganck - Aud. 3

Ghent

Parallel talk Top and Electroweak Physics Top and Electroweak Physics

Speaker

Timothee Theveneaux-Pelzer (Deutsches Elektronen-Synchrotron (DE))

Description

Measurements of the production cross-section of top-quark-antiquark pairs with additional jets provide important tests of quantum chromodynamics (QCD). The ATLAS experiment has measured several final state observables that are sensitive to additional radiation in top-quark-antiquark final states at 13 TeV. These measurements are compared to predictions of modern Monte Carlo generators based on NLO QCD matrix element or LO multi-leg matrix elements. The process of the production of jets originating from b-quarks (b-jets) associated top-q pair produced in association with is particularly important to measure, as there are many uncertainties in the calculation of the process due to the relevance of multiple energy scales. The ATLAS Collaboration has performed fiducial cross-section measurements in the dilepton and lepton-plus-jets ttbar decay channels. Results are presented at particle level in the form of inclusive cross-sections of ttbar final states with three and four b-jets as well as differential cross-sections as a function of global event properties and properties of b-jet pairs.

Primary author

Aurelio Juste Rozas (ICREA and IFAE (ES))

Presentation Materials