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• W2149553691 abstract "Primordial black holes (PBHs) accumulate weakly interacting massive particles (WIMPs) around them and form ultracompact minihalos (UCMHs), if the WIMP is a dominant component of the dark matter (DM). In this Letter, we discuss that the UCMHs seeded by the PBHs with sub-earth mass enhance the WIMP annihilation in the present Universe and can successfully explain the positron and/or electron excess in cosmic ray observed by PAMELA/Fermi experiments. The signal is very similar to that from a decaying dark matter, which can explain the PAMELA and/or Fermi anomaly without conflict with any constraints as long as the decay mode is proper. In this scenario, the boost factor can be as large as 105. In addition, we discuss testability of our scenario by gamma-ray point source and gravitational-wave experiments." @default.
• W2149553691 created "2016-06-24" @default.
• W2149553691 creator A5015347154 @default.
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• W2149553691 date "2011-02-01" @default.
• W2149553691 modified "2023-10-03" @default.
• W2149553691 title "Primordial black hole as a source of the boost factor" @default.
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• W2149553691 doi "https://doi.org/10.1016/j.physletb.2011.01.038" @default.
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