Breit-Wigner Enhancement of Dark Matter Annihilation
High Energy Physics - Phenomenology
2015-05-13 v1
Abstract
We point out that annihilation of dark matter in the galactic halo can be enhanced relative to that in the early universe due to a Breit-Wigner tail, if the dark matter annihilates through a pole just below the threshold. This provides a new explanation to the "boost factor" which is suggested by the recent data of the PAMELA, ATIC and PPB-BETS cosmic-ray experiments.
Keywords
Cite
@article{arxiv.0812.0072,
title = {Breit-Wigner Enhancement of Dark Matter Annihilation},
author = {Masahiro Ibe and Hitoshi Murayama and T. T. Yanagida},
journal= {arXiv preprint arXiv:0812.0072},
year = {2015}
}
Comments
4 pages, 4 figures