Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 94: Supersymmetry: Searches

T 94.7: Vortrag

Freitag, 3. April 2020, 12:30–12:45, H-HS V

Search for chargino and neutralino production in final states with one lepton, a Higgs boson and missing transverse momentum with the ATLAS detector. — •Eric Schanet and Jeanette Lorenz — Ludwig-Maximilians-Universität München

Supersymmetry is a popular extension of the Standard Model of Particle Physics (SM), providing a solution to several 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.

A search for electroweak production of supersymmetric particles, using 139 fb−1 of pp collisions recorded by the ATLAS detector, is presented. In the signal scenario considered, a chargino χ1± is pair-produced together with a next-to-lightest neutralino χ20. The chargino decays via χ1±W±χ10 while the neutralino decays through χ20h χ10. The final state of this signal scenario is thus in many cases characterised by the presence of two b-jets from the Higgs decay, missing transverse momentum and exactly one lepton from W±→ ℓ±ν, providing high discrimination against SM background.

In this talk, the analysis strategy is introduced. It exploits the different shapes of signal and background distributions in a two-dimensional shape fit, resulting in sensitivity to a broad range of kinematic regimes. Finally, the results of the search are presented and discussed.

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