Slightly Non-Minimal Dark Matter in PAMELA and ATIC
High Energy Physics - Phenomenology
2015-03-13 v3 Astrophysics
Abstract
We present a simple model in which dark matter couples to the standard model through a light scalar intermediary that is itself unstable. We find this model has several notable features, and allows a natural explanation for a surplus of positrons, but no surplus of anti-protons, as has been suggested by early data from PAMELA and ATIC. Moreover, this model yields a very small nucleon coupling, well below the direct detection limits. In this paper we explore the effect of this model in both the early universe and in the galaxy.
Cite
@article{arxiv.0810.5167,
title = {Slightly Non-Minimal Dark Matter in PAMELA and ATIC},
author = {Ann E. Nelson and Christopher Spitzer},
journal= {arXiv preprint arXiv:0810.5167},
year = {2015}
}
Comments
7 pages, 6 figures, v3: updated for new data, added discussion of Fermi