Gamma rays and positrons from a decaying hidden gauge boson
High Energy Physics - Phenomenology
2009-01-16 v2 Astrophysics
Abstract
We study a scenario that a hidden gauge boson constitutes the dominant component of dark matter and decays into the standard model particles through a gauge kinetic mixing. Interestingly, gamma rays and positrons produced from the decay of hidden gauge boson can explain both the EGRET excess of diffuse gamma rays and the HEAT anomaly in the positron fraction. The spectra of the gamma rays and the positrons have distinctive features; the absence of line emission of the gamma ray and a sharp peak in the positron fraction. Such features may be observed by the GLAST and PAMELA satellites.
Cite
@article{arxiv.0809.0792,
title = {Gamma rays and positrons from a decaying hidden gauge boson},
author = {Chuan-Ren Chen and Fuminobu Takahashi and T. T. Yanagida},
journal= {arXiv preprint arXiv:0809.0792},
year = {2009}
}
Comments
16 pages, 4 figures, adding PAMELA data, the version accepted by PLB