期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 10, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2008/10/002
关键词
dark matter; physics of the early universe; structure of galaxies
资金
- US Department of Energy [DE-FG03-91ER40662]
- Task C at UCLA
- NSF at the University of Utah [PHY-0456825]
- Direct For Mathematical & Physical Scien
- Division Of Physics [GRANTS:13937831] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [0756962] Funding Source: National Science Foundation
Weakly interacting massive particles (WIMPs) constitute one of very few probes of cosmology before big bang nucleosynthesis (BBN). We point out that in scenarios in which the Universe evolves in a non-standard manner during and after WIMP kinetic decoupling, the horizon mass scale at decoupling can be smaller and the dark matter WIMPs can be colder than in standard cosmology. This would lead to much smaller first objects in hierarchical structure formation. In low reheating temperature scenarios the effect may be large enough to noticeably enhance indirect detection signals in GLAST and other detectors, by up to two orders of magnitude.
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