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Monojets reveal overlapping excesses for light compressed higgsinos

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arxiv 2311.17149 v2 pith:33VUA7QN submitted 2023-11-28 hep-ph

Diyar Agin , Benjamin Fuks , Mark D. Goodsell , Taylor Murphy This is my paper · ORCID
classification hep-ph
keywords searchesexcesseshiggsino-likepointresultssplittingsanalysescompressed
verification ladder T0 review T1 audit T2 compute T3 formal

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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.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Deciphering compressed electroweakino excesses with MadAnalysis 5

    hep-ph 2025-07 conditional novelty 6.0 of 10

    MadAnalysis 5 v1.11 adds validated recasting of two ATLAS compressed-electroweakino searches and shows that a proposed NMSSM scenario fits the soft-lepton and monojet excesses less well than simpler models.

  2. A joint explanation for the soft lepton and monojet LHC excesses in the wino-bino model

    hep-ph 2025-06 conditional novelty 6.0 of 10

    A combined fit to four LHC Run 2 searches prefers a wino-bino supersymmetric spectrum with m(wino) ~ 320 GeV and mass splitting ~ 20 GeV, compatible with bino dark matter.

  3. Interplay of $95$ GeV Diphoton Excess and Dark Matter in Supersymmetric Triplet Model

    hep-ph 2025-04 conditional novelty 5.0 of 10

    A parameter scan shows the triplet-extended MSSM has regions that fit the 95 GeV diphoton signal, the 125 GeV Higgs mass, and the dark matter relic density simultaneously.

  4. The curtain lowers on directly detectable higgsino dark matter

    hep-ph 2024-12 accept novelty 5.0 of 10

    Using LZ2024 limits, the paper derives new lower bounds on gaugino masses and upper bounds on higgsino mass splittings in decoupled-MSSM higgsino dark matter scenarios, plus projections for the neutrino fog.

  5. The LHC has ruled out Supersymmetry -- really?

    hep-ph 2025-05 conditional novelty 4.0 of 10

    LHC searches have not ruled out weak-scale supersymmetry: realistic MSSM spectra with light charginos and neutralinos still escape current bounds, and small excesses may hint at them.

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