Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 75: Top Quark 4 (Eigenschaften)

T 75.9: Talk

Wednesday, March 29, 2017, 18:45–19:00, JUR 4

Measurements of ttbar pair azimuthal decorrelation in the boosted regime at 13TeV — •Daniela Dominguez Damiani, Paolo Gunnellini, and Hannes Jung — DESY

The production of ttbar pairs at high pT, i.e. the so-called boosted regime, is characterized by two collimated jets which contain most of the particles originating from the top decays. We investigate a scenario with both top quarks decaying hadronically. We attempt a definition of "top jet", by considering the substructure of the selected "fat" jets resulting from the top decay and we study the contamination from QCD events. First results of differential cross sections as a function of the azimuthal difference between the two top jets, using 2016 data collected with the CMS experiment, are presented and analogies to generic QCD dijet topologies are highlighted.