High Energy Physics - Phenomenology
[Submitted on 28 Nov 2023 (v1), last revised 26 Apr 2024 (this version, v2)]
Title:Monojets reveal overlapping excesses for light compressed higgsinos
View PDF HTML (experimental)Abstract:The ATLAS and CMS collaborations have recently presented results of searches for compressed electroweakinos in final states including soft leptons. These searches are sensitive to mass splittings ranging from quite small values of about 5 GeV to O(10) GeV, which are endemic to scenarios with wino-like and higgsino-like lightest supersymmetric particles (LSPs). While all experimental results exhibit apparently compatible mild excesses, these soft-lepton analyses, taken together with disappearing-track searches targeting much smaller splittings, notably leave unconstrained a sizeable region of parameter space with modest splittings of 1-5 GeV. We point out that this gap can be closed, for scenarios with a higgsino-like LSP, by monojet searches. On the other hand, we find at the same time that current monojet searches show excesses in a region partially overlapping that favoured by the soft-lepton analyses. We provide an up-to-date map of these results and show, among others, a best-fit point with an excess greater than $2\sigma$ that is consistent with a higgsino-like LSP mass around 177 GeV. We finally comment on how such a point can be realised in the MSSM.
Submission history
From: Taylor Murphy [view email][v1] Tue, 28 Nov 2023 19:00:01 UTC (281 KB)
[v2] Fri, 26 Apr 2024 14:34:39 UTC (443 KB)
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