Phys. Rev. Lett. 102, 071301 (2009) [4 pages]Constraints on WIMP Dark Matter from the High Energy PAMELA p̅ /p Data
See accompanying Physics Synopsis A new calculation of the p̅ /p ratio in cosmic rays is compared to the recent PAMELA data. The good match up to 100 GeV allows us to set constraints on exotic contributions from thermal weakly interacting massive particle (WIMP) dark matter candidates. We derive stringent limits on possible enhancements of the WIMP p̅ flux: a mWIMP=100 GeV (1 TeV) signal cannot be increased by more than a factor of 6 (40) without overrunning PAMELA data. Annihilation through the W+W- channel is also inspected and cross-checked with e+/(e-+e+) data. This scenario is strongly disfavored as it fails to simultaneously reproduce positron and antiproton measurements. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.071301
DOI:
10.1103/PhysRevLett.102.071301
PACS:
95.35.+d, 14.80.−j, 98.35.Gi, 98.70.Sa
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