Journal
PHYSICAL REVIEW D
Volume 90, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.023535
Keywords
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Funding
- National Science Foundation [PHY-1215979]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1215979] Funding Source: National Science Foundation
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If R parity is only mildly violated, then the lightest supersymmetric particle (LSP) can be stable over cosmologically time scales and still account for the dark matter relic density. We examine the possibility of generating detectable x-ray lines from R-parity violating decays of keV-scale LSP dark matter to neutrino-photon pairs. Specifically, we consider scenarios in which the LSP is a light gravitino, bino, or hidden sector photino. Potential signals are discussed in the context of recent claims of an unidentified 3.5 keV x-ray line in studies of stacked galaxy clusters. We comment on the difficulties in obtaining the observed relic density for keV-scale bino or hidden photino dark matter and some possible resolutions.
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