Principal properties of the velocity distribution of dark matter particles on the outskirts of the Solar System

9 Jun 2011, 11:30
30m

Speaker

Dr Anton Baushev (DESY Zeuthen)

Description

Velocity distribution of the dark matter particles on the outskirts of the Solar System remains unclear. We show that under very common assumptions it should be highly anisotropic and have a sharp maximum near $\upsilon\sim 500$~{km/s}. The distribution is totally different from the Maxwell one. We analyze the influence of the distribution function on the results of dark matter detection experiments. It is found that the direct detection signal should differ noticeably from the one calculated from the Maxwell distribution with $\langle \upsilon\rangle \simeq 220$~{km/s}, which is conventional for direct detection experiments. Moreover, the sharp distinction from the Maxwell distribution can be very essential to the observations of dark matter annihilation.

Primary author

Dr Anton Baushev (DESY Zeuthen)

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