From Pamela to CDMS and Back

Details From Pamela to CDMS and Back From Pamela to CDMS and Back

2009-12-22

arxiv.org/abs/0912.4510v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures. Version to appear in Phys. Lett. B

Scientific paper

We take the recent result from the CDMS collaboration as a hint that the dark matter has an elastic scattering cross section with the nucleon in the vicinity of 10^-7 pb. By crossing symmetry such a cross section implies annihilation of dark matter into hadrons inside the halo, resulting in an anti-proton flux that could be constrained by data from the PAMELA collaboration if one includes a large boost factor necessary to explain the PAMELA excess in the positron fraction. As an illustration, we present a model-independent analysis for a fermionic dark matter and study the upper bound on the boost factor using the PAMELA anti-proton flux.

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