Jul 26 – 30, 2010
Montpellier 2 University
Europe/Paris timezone

The Sommerfeld Enhancement for Inelastic Dark Matter

Jul 29, 2010, 2:00 PM
20m
Salle des Actes (Montpellier 2 University)

Salle des Actes

Montpellier 2 University

Place Eugene Bataillon, 34095 Montpellier Cedex 5 FRANCE

Speaker

Dr Tracy Slatyer (Harvard University)

Description

Recently measured excesses in electron and positron cosmic rays have motivated models of dark matter with a velocity-dependent Sommerfeld enhancement to the annihilation rate. These models frequently feature nearly-degenerate excited states for the dark matter; such excited states may also furnish explanations for the DAMA/LIBRA annual modulation and INTEGRAL 511 keV line. I will present an accurate semi-analytic approximation for the Sommerfeld enhancement in models with a single excited state, and discuss novel features of the enhancement relative to the case with no excited states. I will also show the range of annihilation cross sections that can be achieved in the local dark matter halo, for models of this type, where the dark matter is a thermal relic with the correct relic abundance and constraints from the cosmic microwave background are respected.

Primary author

Dr Tracy Slatyer (Harvard University)

Presentation materials