Open this publication in new window or tab >>2018 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 7, article id 003Article in journal (Refereed) Published
Abstract [en]
We derive constraints on mixed dark-matter scenarios consisting of primordial black holes (PBHs) and weakly interacting massive particles (WIMPs). In these scenarios, we expect a density spike of the WIMPs that are gravitationally bound to the PBHs, which results in an enhanced annihilation rate and increased indirect detection prospects. We show that such scenarios provide strong constraints on the allowed fraction of PBHs that constitutes the dark matter, depending on the WIMP mass m(x) and the velocity-averaged annihilation cross-section <sigma v >. For the standard scenario with m(x) = 100 GeV and <sigma v > = 3 x 10(-26) cm(3)/s, we derive bounds that are stronger than all existing bounds for PBHs with masses 10(-12) M-circle dot less than or similar to M-BH less than or similar to 10(4) where M-circle dot, is the solar mass, and mostly so by several orders of magnitude.
Place, publisher, year, edition, pages
IOP PUBLISHING LTD, 2018
Keywords
dark matter theory, primordial black holes
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-232405 (URN)10.1088/1475-7516/2018/07/003 (DOI)000437299100003 ()2-s2.0-85051711141 (Scopus ID)
Note
QC 20180726
2018-07-262018-07-262018-10-16Bibliographically approved