R-violating decay of Wino dark matter and electron/positron excesses in the PAMELA/Fermi experiments

Satoshi Shirai, Fuminobu Takahashi, T. T. Yanagida

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

We show that R-parity violating decay of Wino dark matter of mass about 3 TeV can naturally account for the flux and spectral shape of the cosmic-ray electrons and positrons observed by the PAMELA and Fermi satellites. To provide a theoretical basis for the scenario, we present a model in which trilinear R-parity breaking appears with a coefficient suppressed by powers of the gravitino mass, which naturally leads to the Wino lifetime of O (1026) seconds.

Original languageEnglish
Pages (from-to)485-488
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume680
Issue number5
DOIs
Publication statusPublished - 2009 Oct 12
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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