| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1841019 | Nuclear Physics B | 2011 | 9 Pages |
Abstract
We propose an analytic treatment for computing the relic abundances of non-relativistic particles whose annihilation rate at chemical decoupling is increased by Sommerfeld enhancement. We find approximate rational functions that closely fit the thermal average of Sommerfeld-enhanced cross sections in the massless limit of force carriers for s- and p-wave annihilations. We demonstrate that, with the approximate thermally-averaged cross sections implemented, the standard analytic method for the final relic abundances provides accuracy to within 1% even for the case of Sommerfeld enhancement.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Hoernisa Iminniyaz, Mitsuru Kakizaki,