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T: Fachverband Teilchenphysik

T 83: Top-Physik III

T 83.8: Vortrag

Donnerstag, 28. März 2019, 17:45–18:00, S10

Measurement of substructure variables in boosted top quark decays at CMS — Johannes Haller, Roman Kogler, and •Jan Skottke — Institut für Experimentalphysik, Universität Hamburg

Highly boosted top quarks play an essential role in various searches for new physics. If they carry high transverse momentum, they decay within a single jet. Highly sensitive substructure variables can be used to discriminate those jets from jets of other processes.

In this talk first studies are presented towards a measurement of substructure variables, such as N-subjettiness using data of pp collisions recorded by the CMS experiment in 2016 at a center of mass energy of 13 TeV. We select highly boosted top quarks in the lepton + jets channel of tt, which guarantees a good background rejection while maintaining high selection efficiency.