Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 30: Suche nach Neuen Teilchen II

T 30.10: Talk

Tuesday, March 26, 2019, 18:15–18:30, H07

Search for heavy resonances decaying to top quark pairs with the CMS experiment — Johannes Haller, Anastasia Karavdina, Roman Kogler, and •Arne Christoph Reimers — Institut für Experimentalphysik, Universität Hamburg

We present a search for new heavy resonances decaying to pairs of top quarks (tt) in data of pp-collisions at √s=13 TeV recorded by the CMS experiment in 2017.

The search is carried out in the final state with exactly one muon and jets. Highly boosted top quarks decaying to the all-jets final state are identified using a top-tagging technique, maximizing the expected sensitivity to large resonance masses.

The invariant mass of the tt system is reconstructed from the muon, missing transverse momentum, and jets, where the hadronically decaying top quark is identified either by a top-tagged large-radius jet or a combination of jets with smaller radius. Its distribution is used to set expected exclusion limits on the production cross section of new heavy resonances decaying to top quarks in different benchmark models. The expected limits are compared to the public result obtained with the 2016 dataset. Different approaches to improve the overall sensitivity of the analysis are discussed.