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T: Fachverband Teilchenphysik

T 26: Suche nach Supersymmetrie I

T 26.8: Talk

Tuesday, March 20, 2018, 18:15–18:30, Philo-HS3

Search for physics beyond the standard model with photons, missing transverse momentum and hadronic activity — •Maximilian Knut Kiesel, Christian Autermann, and Lutz Feld — I. Physikalisches Institut B, RWTH Aachen University

A search for physics beyond the standard model in proton-proton collisions with photons in the final state will be presented. Such final states are motivated by gauge mediated supersymmetry breaking models, in which a neutralino decays to an undetectable gravitino and a photon. If the neutralinos are produced through the strong interaction, the jets in the decay cascade lead to a large amount of hadronic activity. This search uses proton-proton collisions at a center-of-mass energy of 13 TeV recorded with the CMS detector in 2016, corresponding to an integrated luminosity of about 36 fb⁻¹. At least one high energetic photon, hadronic activity and missing transverse momentum are required. The contribution of multijet production with real photons or jets identified as photons is estimated using a jet-enriched data control region. The contribution of electrons being reconstructed as photons is estimated using an electron-enriched data control, while the contribution of γW, γZ, and γ tt events is estimated using simulation. Simultaneous count experiments in several bins with high missing transverse momentum and high hadronic activity are performed to evaluate the presence of physics beyond the standard model. For low neutralino masses, this analysis provides the most stringent exclusion limits for gluino and squark pair production in general gauge mediated supersymmetry models.