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T: Fachverband Teilchenphysik
T 10: Top quarks: pair production and tagging
T 10.3: Vortrag
Montag, 30. März 2020, 17:00–17:15, H-HS XI
Jet activity measurement in top pair production in dilepton channel with the ATLAS experiment — •Matthieu Robin for the ATLAS collaboration — DESY, Zeuthen
Following previous studies on tt + jets published in 2017 and on ttbb published in early 2019, this study aims to use the full LHC run II dataset of 139 fb−1 to improve the results in statistically limited regions as well as methods to better estimate our signal background such as fake background and pile-up jets.
This study plays a major role for other analyses regarding the understanding of their QCD background (e.g.: ttHbb), and is also important by itself to improve our understanding of additional jet radiation properties and provide tests of the QCD and SM predictions. This should further help to improve the modelling of tt + jets in the MC generators.
In this talk will be shown updated data/MC comparisons with some unfolded results and systematics studies that I performed with the help of the tt + jets analysis team of ATLAS.