High-energy cosmic-ray positrons from hidden-gauge-boson dark matter

Chuan Ren Chen*, Fuminobu Takahashi, T. T. Yanagida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)255-259
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4-5
Publication statusPublished - 2009 Mar 30
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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