| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1852613 | Physics Letters B | 2015 | 5 Pages |
Abstract
We study the effects of dark-matter annihilation during the epoch of big-bang nucleosynthesis on the primordial abundances of light elements. We improve the calculation of the light-element abundances by taking into account the effects of anti-nucleons emitted by the annihilation of dark matter and the interconversion reactions of neutron and proton at inelastic scatterings of energetic nucleons. Comparing the theoretical prediction of the primordial light-element abundances with the latest observational constraints, we derive upper bounds on the dark-matter pair-annihilation cross section. Implication to some of particle-physics models are also discussed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi, Yoshitaro Takaesu,