Gamma-ray constraints on hadronic and leptonic activities of decaying dark matter

Chuan-Ren Chen, Sourav K. Mandal, Fuminobu Takahashi

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30 引文 斯高帕斯(Scopus)

摘要

While the excess in cosmic-ray electrons and positrons reported by PAMELA and Fermi may be explained by dark matter decaying primarily into charged leptons, this does not necessarily mean that dark matter should not have any hadronic decay modes. In order to quantify the allowed hadronic activities, we derive constraints on the decay rates of dark matter into WW, ZZ, hh, qq and gg using the Fermi and HESS gamma-ray data. We also derive gamma-ray constraints on the leptonic e+e-, μ+μ- and τ+τ- final states. We find that dark matter must decay primarily into μ+μ- or τ+τ - in order to simultaneously explain the reported excess and meet all gamma-ray constraints.

原文英語
文章編號023
期刊Journal of Cosmology and Astroparticle Physics
2010
發行號1
DOIs
出版狀態已發佈 - 2010 二月 12

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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