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PIRSA:11090111

Astrophysical Constraints on Dark Matter Annihilation with Sommerfeld Enhancement

APA

Zavala Franco, J. (2011). Astrophysical Constraints on Dark Matter Annihilation with Sommerfeld Enhancement. Perimeter Institute for Theoretical Physics. https://pirsa.org/11090111

Jesus Zavala Franco University of Iceland

Talk numberPIRSA:11090111
Source RepositoryPIRSA
Talk Type Conference

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.