Search for chargino-neutralino pair production in final states with three leptons and missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector

G. Aad, B. Abbott, DC Abbott, AA Abud, K. Abeling, D.K. Abhayasinghe, S.H. Abidi, Ossama Sherif Alexander AbouZeid, H. Abramowicz, H. Abreu, Alessandra Camplani, Mogens Dam, Jørgen Beck Hansen, Jørn Dines Hansen, Peter Henrik Hansen, Rosanna Ignazzi, Troels Christian Petersen, Graig Wiglesworth, Stefania Xella, ATLAS Collaboration

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Abstract

A search for chargino–neutralino pair production in three-lepton final states with missing transverse momentum is presented. The study is based on a dataset of s√=13 TeV pp collisions recorded with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb−1. No significant excess relative to the Standard Model predictions is found in data. The results are interpreted in simplified models of supersymmetry, and statistically combined with results from a previous ATLAS search for compressed spectra in two-lepton final states. Various scenarios for the production and decay of charginos (χ~±1) and neutralinos (χ~02) are considered. For pure higgsino χ~±1χ~02 pair-production scenarios, exclusion limits at 95% confidence level are set on χ~02 masses up to 210 GeV. Limits are also set for pure wino χ~±1χ~02 pair production, on χ~02 masses up to 640 GeV for decays via on-shell W and Z bosons, up to 300 GeV for decays via off-shell W and Z bosons, and up to 190 GeV for decays via W and Standard Model Higgs bosons
Original languageEnglish
Article number1118
JournalEuropean Physical Journal C
Volume81
Issue number12
Number of pages55
ISSN1434-6044
DOIs
Publication statusPublished - 2021

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