Cosmic rays from leptonic dark matter

Chuan Ren Chen, Fuminobu Takahashi

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66 引文 斯高帕斯(Scopus)

摘要

If dark matter possesses a lepton number, it is natural to expect the dark-matter annihilation and/or decay mainly produces the standard model leptons, while negligible amount of the antiproton is produced. To illustrate such a simple idea, we consider a scenario that a right-handed sneutrino dark matter decays into the standard model particles through tiny R-parity violating interactions. Interestingly enough, charged leptons as well as neutrinos are directly produced, and they can lead to a sharp peak in the predicted positron fraction. Moreover, the decay of the right-handed sneutrino also generates diffuse continuum gamma rays which may account for the excess observed by EGRET, while the primary antiproton flux can be suppressed. Those predictions on the cosmic-ray fluxes of the positrons, gamma rays and antiprotons will be tested by the PAMELA and FGST observatories.

原文英語
文章編號004
期刊Journal of Cosmology and Astroparticle Physics
2009
發行號2
DOIs
出版狀態已發佈 - 2009 五月 25

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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