Gamma rays and positrons from a decaying hidden gauge boson

Details Gamma rays and positrons from a decaying hidden gauge boson Gamma rays and positrons from a decaying hidden gauge boson

2008-09-04

arxiv.org/abs/0809.0792v2

Phys.Lett.B671:71-76,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 4 figures, adding PAMELA data, the version accepted by PLB

Scientific paper

10.1016/j.physletb.2008.11.048

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.

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