Taking aim at the wino-higgsino plane with the LHC
arXiv:2309.07213 · doi:10.1103/PhysRevD.109.015012
Abstract
In this work we explore multiple search strategies for higgsinos and mixed higgsino-wino states in the MSSM and project the results onto the plane. Assuming associated production of higgsino-like pairs with a 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 mass plane at integrated luminosities of up to . Altogether, the full run of the HL-LHC can exclude much of the "natural" ( 500 GeV) wino-higgsino parameter space.
arXiv comment13 pages, 7 figures. Updated to resemble Phys. Rev. D Version of Record
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