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



Aad, G, Abbott, B, Abbott, DC, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abramowicz, H, Abreu, H
et al (show 2849 more authors) (2021) Search for chargino-neutralino pair production in final states with three leptons and missing transverse momentum in √<i>s</i>=13 TeV <i>pp</i> collisions with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 81 (12). 1118-.

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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 $\sqrt{s} = 13$ 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 ($\tilde\chi^\pm_1$) and neutralinos ($\tilde\chi^0_2$) are considered. For pure higgsino $\tilde\chi^\pm_1\tilde\chi^0_2$ pair-production scenarios, exclusion limits at 95% confidence level are set on $\tilde\chi^0_2$ masses up to 210 GeV. Limits are also set for pure wino $\tilde\chi^\pm_1\tilde\chi^0_2$ pair production, on $\tilde\chi^0_2$ 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.

Item Type: Article
Additional Information: 104 pages in total, author list starting page 89, 20+14aux figures, 21+19aux tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2019-09/
Uncontrolled Keywords: hep-ex, hep-ex
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 12 Jan 2022 14:34
Last Modified: 06 Oct 2023 09:08
DOI: 10.1140/epjc/s10052-021-09749-7
Open Access URL: https://link.springer.com/article/10.1140%2Fepjc%2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3146208