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arXiv · 0811.0477

High-energy Cosmic-Ray Positrons from Hidden-Gauge-Boson Dark Matter

Chuan-Ren Chen·Fuminobu Takahashi·T. T. Yanagida
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Abstract

We provide a scenario in which a hidden U(1) gauge boson constitutes dark matter of the Universe and decays into the standard-model particles through a kinetic mixing with an $U(1)_{B-L}$ gauge boson. Interestingly, our model can naturally account for the steep rise in the positron fraction recently reported by PAMELA. Moreover, we find that due to the charge assignment of $U(1)_{B-L}$, only a small amount of antiprotons are produced in the decay, which is also consistent with the PAMELA and other observational data.

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Chuan-Ren Chen, Fuminobu Takahashi, T. T. Yanagida. 2009-07-02. High-energy Cosmic-Ray Positrons from Hidden-Gauge-Boson Dark Matter. https://doi.org/10.1016/j.physletb.2009.02.046

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