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T: Fachverband Teilchenphysik

T 10: Search for New Particles -1

T 10.2: Talk

Monday, March 21, 2022, 16:30–16:45, T-H23

Search for high-mass dilepton resonances in association with b-jets with the ATLAS detector at √s=13TeV — Volker Austrup, Frank Ellinghaus, Jens Roggel, and •Maren Stratmann — Bergische Universität Wuppertal

Potential deviations from the Standard Model predictions observed in decay processes involving a b→ s quark transition hint at Beyond Standard Model physics. One possible explanation for the deviations is the existence of a new heavy vector boson, the Z’, which couples only to quarks of the second and third generation.
In this talk, the status of a search for a lefthanded Z’ produced in association with jets originating from b or s quarks is presented. The search is carried out in the dileptonic Z’ decay channel. An overview of the analysis strategy, including two different approaches for defining a signal region, is given and a preliminary limit on the Z’ production cross section is set.