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Long live the Higgs portal!
2019
Journal of High Energy Physics
In Higgs portal models of fermion dark matter, scalar couplings are unavoidably suppressed by strong bounds from direct detection experiments. As a consequence, thermal dark matter relics must coexist with mediators in a compressed spectrum of dark particles. Small couplings and small mass splittings lead to slow mediator decays, leaving signatures with displaced vertices or disappearing tracks at colliders. We perform a comprehensive analysis of long-lived mediators at the LHC in the context
doi:10.1007/jhep02(2019)140
fatcat:psb5yuqfyngvzoz4js2ozphzs4