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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

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

classification hep-ph
keywords bosonhiggsdarkfermionsmatterabelian-gaugedcolliderhidden
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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