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Dark matter annihilation through a lepton-specific Higgs boson · Around

2010

Dark matter annihilation through a lepton-specific Higgs boson

Logan, Heather E.

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It was recently argued by Hooper and Goodenough [arXiv:1010.2752] that the excess gamma ray emission from within 1-2 degrees of the galactic center can be well-described by annihilation of ~8 GeV dark matter particles into tau pairs.

I show that such a dark matter signal can be obtained naturally in the lepton-specific two-Higgs-doublet model extended by a stable singlet scalar dark matter candidate.
The favored parameter region prefers a light Higgs state (below 200 GeV) with enhanced couplings to leptons and sizable invisible branching fraction.
Part of the favored region leads to invisible decays of both of the CP-even neutral Higgs states.

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2009

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D. Hooper and L. Goodenough, arXiv:1010.2752 [hep-ph]

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