Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 27: BSM Suchen III (Vektorartige Quarks)

T 27.6: Vortrag

Montag, 29. Februar 2016, 18:00–18:15, VMP6 HS B

Search for single production of a vector-like T quark decaying into a top quark and a Higgs boson — Daniel Gonzales, Ivan Marchesini, Dominik Nowatschin, Alexander Schmidt, Svenja Schumann, •Heiner Tholen, and Emanuele Usai — Universität Hamburg, Institut für Experimentalphysik

We search for singly produced vector-like top quark partners (T) in pp-collisions at √s=13 TeV with the CMS experiment. Several BSM models, such as composite Higgs and extra dimensions, predict vector-like quarks to be accessible at the LHC. At 13 TeV, single production of vector-like quarks might be enhanced over pair production, depending on the coupling parameters for the individual interactions. In this analysis, we target the decay of the vector-like heavy T quark into a Higgs boson and a top quark, where the top quark decay includes a lepton.

Higgs-boson candidates are reconstructed using new methods to resolve the substructure of boosted jets and top-quark candidates are formed by combining leptons, missing transverse energy and jets. With the top-quark and Higgs-boson candidates, we aim for the complete reconstruction of the four-vector of the new particle in question. The largest fraction of the background is contributed through the top-quark pair production process. First results on the search for single vector-like top partners at 13 TeV are presented.