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Dark matter and Higgs boson collider implications of fermions in an abelian-gauged hidden sector

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arxiv 0904.2007 v1 pith:RFCFOCSB submitted 2009-04-13 hep-ph

classification hep-ph
keywords bosonhiggsdarkfermionsmatterabelian-gaugedcolliderhidden
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We add fermions to an abelian-gauged hidden sector. We show that the lightest can be the dark matter with the right thermal relic abundance, and discovery is within reach of upcoming dark matter detectors. We also show that these fermions change Higgs boson phenomenology at the Large Hadron Collider (LHC), and in particular could induce a large invisible width to the lightest Higgs boson state. Such an invisibly decaying Higgs boson can be discovered with good significance in the vector boson fusion channel at the LHC.

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  1. The Two Scales of New Physics in Loop-Induced Higgs Couplings

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A deviation in the loop-induced Higgs couplings hgg, hγγ, or hZγ caused solely by new vectorlike fermions implies an upper bound on the mass scale of new bosons needed to restore perturbativity and vacuum stability.

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