Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 36: Supersymmetrie I

T 36.8: Talk

Tuesday, March 26, 2019, 17:45–18:00, S11

Search for electroweakinos in events with one lepton with the ATLAS detector at the LHC — •Eric Schanet and Jeanette Lorenz — Ludwig-Maximilians-Universität München

Supersymmetry is a promising extension of the Standard Model of Particle Physics (SM) as it provides a solution to some of the open questions of the SM. If squarks and gluinos are beyond the reach of the LHC, the production of charginos and neutralinos could be the dominant production mode of supersymmetric particles in √s = 13 TeV pp collisions at the LHC.

In this talk, a search for the production of charginos and neutralinos, using 140 fb⁻¹ of pp collisions recorded from 2015 to 2018 by the ATLAS detector, is presented. In the signal scenario considered, the chargino decays via χ₁^±→ W χ₁⁰ while the neutralino decays through χ₂⁰ → h χ₁⁰. In many events, the final state of this signal scenario is thus characterised by the presence of exactly one lepton from W^±→ℓ^±ν, two b-jets from the Higgs decay and missing transverse momentum, providing high discrimination against SM background processes. In this talk, the analysis strategy in this decay channel as well as the signal regions optimisation and the sensitivity projections will be presented.