Big bang archeology: WIMP capture by the earth at finite optical depth
Jul 11, 199119 pages
Published in:
- Astrophys.J. 387 (1992) 21
DOI:
Report number:
- IASSNS-AST-91-35
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Abstract: (ADS)
Capture of weakly interacting massive particles (WIMPs) by the earth may be dominated by multiple collisions, even when the 'optical depth' of the earth is small, and hence multiple collisions constitute a small fraction of all interactions. For scalar neutrinos of mass m(x) = 75 GeV, this effect increases the capture rate by a factor about 5. A WIMP with optical depth of about 1 would have capture enhanced by up to a factor about 30. These results are primarily of interest in the search for cosmological relics, stable particles whose relic density is too small to make up the dark matter, and whose mass is too large for them to have been seen in accelerator experiments.References(12)
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