Dark Matter after BESS-Polar II

Details Dark Matter after BESS-Polar II Dark Matter after BESS-Polar II

2011-10-19

arxiv.org/abs/1110.4376v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 4 figures

Scientific paper

The BESS-Polar collaboration has recently performed a precise measurement of the local antiproton flux which is consistent with a pure secondary production of antiprotons. We constrain a possible primary component originating from dark matter pair-annihilations. We derive limits on the annihilation cross section which are stronger than or comparable to those from the PAMELA satellite experiment for dark matter masses up to 200 GeV. Especially, we exclude thermal WIMPs with masses in the range 3-20 GeV if they annihilate dominantly into quark pairs unless their cross section is velocity suppressed.

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