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Monojets and mono-photons from light higgsino pair production at LHC14

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arxiv 1401.1162 v2 pith:GJEB5KZ2 submitted 2014-01-06 hep-ph

classification hep-ph
keywords higgsinopairproductionhiggsinoslhc14mono-photonsmonojetsremain
verification ladder T0 review T1 audit T2 compute T3 formal
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Naturalness arguments imply the existence of higgsinos lighter than 200-300 GeV. However, because these higgsinos are nearly mass degenerate, they release very little visible energy in their decays, and signals from electroweak higgsino pair production typically remain buried under Standard Model backgrounds. Moreover, gluinos, squarks and winos may plausibly lie beyond the reach of the LHC14, so that signals from naturalness-inspired supersymmetric models may well remain hidden via conventional searches. We examine instead prospects for detecting higgsino pair production via monojets or mono-photons from initial state radiation. We find typical signal-to-background rates at best at the 1 % level, leading to rather pessimistic conclusions regarding detectability via these channels.

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  1. 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.

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