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Probing feebly interacting dark matter with monojet searches

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arxiv 2208.09422 v2 pith:TGW7FYNV submitted 2022-08-19 hep-ph

Jérôme Claude , Maíra Dutra , Stephen Godfrey This is my paper · ORCID
classification hep-ph
keywords fimpssearchesdarkfeeblyfreeze-ininteractingmattermodel
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abstract

Dark matter may consist of feebly interacting massive particles (FIMPs) that never thermalized with the cosmic plasma. Their relic density is achieved via freeze-in for a wide range of masses, significantly expanding the model space that can be tested compared to other production mechanisms. However, testing the tiny couplings required by freeze-in is challenging. We show that FIMPs can be probed by LHC searches for new physics in mono-jet events with large missing energy. We study a $Z'$ portal model in which gluon annihilation produces FIMPs in the early universe and today at colliders. Monojet searches by LHC Run 3 might discover new physics accounted for by FIMPs with mass in the MeV-TeV range.

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  1. The bremsstrahlung-like production of the massive spin-2 dark matter mediator

    hep-ph 2024-12 conditional novelty 6.0 of 10

    E137 beam-dump data exclude spin-2 dark matter mediator couplings from about 8e-8 to 1e-5 per GeV for mediator masses 100 to 800 MeV, assuming equal electron and photon couplings.

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