Taking aim at the wino-Higgsino plane with the LHC

Carpenter, Linda M.; Gilmer, Humberto; Kawamura, Junichiro; Murphy, Taylor

doi:10.1103/PhysRevD.109.015012

Title: Taking aim at the wino-Higgsino plane with the LHC

Journal Article · 10 January 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.109.015012 · OSTI ID:2280875

Carpenter, Linda M.; Gilmer, Humberto; Kawamura, Junichiro;

In this work we explore multiple search strategies for Higgsinos and mixed Higgsino-wino states in the minimal supersymmetric Standard Model (MSSM) and project the results onto the $(μ, M_{2})$ plane. Assuming associated production of Higgsino-like pairs with a $W / Z$ boson, we develop a search in a channel characterized by a hadronically tagged vector boson accompanied by missing energy. We use as our template an ATLAS search for dark matter produced in association with a hadronically decaying vector boson, but upgrade the search by implementing a joint-likelihood analysis, binning the missing transverse energy distribution, which greatly improves the search sensitivity. For Higgsino-like states (more than 96% admixture) we find sensitivity to masses up to 550 GeV. For well-mixed Higgsino-wino states (70–30% Higgsino) we still find sensitivities above 300 GeV. Using this newly proposed search, we draw a phenomenological map of the wino-Higgsino parameter space, recasting several complementary searches for disappearing tracks, soft leptons, trileptons, and hadronic diboson events in order to predict LHC coverage of the $(μ, M_{2})$ mass plane at integrated luminosities of up to $3 {ab}^{- 1}$ . Altogether, the full run of the HL-LHC can exclude much of the “natural” ( $μ, M_{2} < 500 GeV$ ) wino-Higgsino parameter space. Published by the American Physical Society 2024

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Research Organization:: The Ohio State Univ., Columbus, OH (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: SC0024179

OSTI ID:: 2280875

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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