Significant Gamma Lines from Inert Higgs Dark Matter

Details Significant Gamma Lines from Inert Higgs Dark Matter Significant Gamma Lines from Inert Higgs Dark Matter

2007-03-20

arxiv.org/abs/astro-ph/0703512v3

Phys.Rev.Lett.99:041301,2007

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures; minor changes and text improvements; references updated; published version

Scientific paper

10.1103/PhysRevLett.99.041301

One way to unambiguously confirm the existence of particle dark matter and determine its mass would be to detect its annihilation into monochromatic gamma-rays in upcoming telescopes. One of the most minimal models for dark matter is the inert doublet model, obtained by adding another Higgs doublet with no direct coupling to fermions. For a mass between 40 and 80 GeV, the lightest of the new inert Higgs particles can give the correct cosmic abundance of cold dark matter in agreement with current observations. We show that for this scalar dark matter candidate, the annihilation signal of monochromatic \gamma\gamma and Z\gamma final states would be exceptionally strong. The energy range and rates for these gamma-ray line signals make them ideal to search for with the soon upcoming GLAST satellite.

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