Journal
PHYSICAL REVIEW D
Volume 87, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.123534
Keywords
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Funding
- ICHEP2012
- Center for Theoretical Underground Physics and Related Areas (CETUP*) in South Dakota
- Center for High Performance Computing at the University of Utah
- Department of Energy [DE-FG02-04ER41291]
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We consider regions of the parameter space of the minimal supersymmetric standard model with bino-like neutralino dark matter in which a large fraction of the total dark matter annihilation cross section in the present era arises from annihilation to final states with monoenergetic photons. The region of interest is characterized by light sleptons and heavy squarks. We find that it is possible for the branching fraction to final states with monoenergetic photons to be comparable to that for continuum photons, but in those cases the total cross section will be so small that it is unlikely to be observable. For models where dark matter annihilation may be observable in the present era, the branching fraction to final states with monoenergetic photons is O(1%-10%).
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