科研之友
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摘要
We derive 95% CL lower limits on the lifetime of decaying dark matter in the channels Z nu, Wl and h nu using measurements of the cosmic-ray antiproton flux by the PAMELA experiment. Performing a scan over the allowed range of cosmic-ray propagation parameters we find lifetime limits in the range of 8 x 10(28) s to 5 x 10(25) s for dark matter masses from roughly 100 GeV to 10 TeV. We apply these limits to the well-motivated case of gravitino dark matter in scenarios with bilinear violation of R-parity and find a similar range of lifetime limits for the same range of gravitino masses. Converting the lifetime limits to constraints on the size of the R-parity violating coupling we find upper limits in the range of 10(-8) to 8 x 10(-13).
- 出版日期2013-12
