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T: Fachverband Teilchenphysik

T 51: Suche nach Physik jenseits des Standardmodels III

T 51.4: Vortrag

Mittwoch, 21. März 2018, 17:20–17:35, Philo-HS4

Search for excited bottom quarks decaying to tW with the CMS experiment — Johannes Haller, Roman Kogler, and •Alexander Fröhlich — Universität Hamburg, Institut für Experimentalphysik

We present a search for singly produced excited bottom quarks (b*) decaying to tW in pp-collisions at √s = 13 TeV. In this analysis, the muon + jets final state is studied. The W from the b* is assumed to decay into a muon and a neutrino and hence its four-momentum is reconstructed from the muon and the missing transverse energy. The W from the top quark decays hadronically. The top quark is assumed to be highly boosted and is reconstructed in a single jet. For its identification the analysis makes use of a new top tagging algorithm, the Heavy Object Tagger with Variable R (HOTVR). The adaptive cone size of this algorithm allows for a stable reconstruction efficiency over a large range of b* masses, which warrants a single analysis strategy for b* masses of 700 GeV up to a few TeV. The distribution of the reconstructed b* mass is used to search for deviations from the SM background prediction. Expected limits on the production cross-section are presented.