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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:11090111  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Astrophysical Constraints on Dark Matter Annihilation with Sommerfeld Enhancement
Abstract: Dark matter models with an annihilation cross section enhanced by a Sommerfeld mechanism have been proposed in the past years to explain a number of observed anomalies, such as the excess of high energy positrons in cosmic rays reported by PAMELA. However, this enhancement can not be arbitrarily large without violating a number of astrophysical measurements. In this talk, I will discuss the degree to which these measurements can constrain Sommerfeld-enhanced models. In particular, I will talk about constraints coming from the observed abundance of dark matter and the extragalactic background light measured at multiple wavelengths.
Date: 22/09/2011 - 2:40 pm
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