Goldstini as the decaying dark matter

Hsin Chia Cheng*, Wei Chih Huang, Ian Low, Arjun Menon

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

We consider a new scenario for supersymmetric decaying dark matter without R-parity violation in theories with goldstini, which arise if supersymmetry is broken independently by multiple sequestered sectors. The uneaten goldstino naturally has a long lifetime and decays into three-body final states including the gravitino, which escapes detection, and two visible particles. The goldstini low-energy effective interactions are derived, which can be non-universal and allow the dark matter to be leptophilic, in contrast to the case of a single sector supersymmetry breaking. In addition, the three-body decay with a missing particle gives a softer spectrum. Consequently, it is possible to fit both the e+/e- excess observed by the PAMELA and the e+ +e- measurements by the Fermi-LAT using universal couplings to all three lepton flavors or 100% branching fraction into electrons/ positrons, both of which are disfavored in the conventional scenario of dark matter decays into two or four visible particles without missing energy.

Original languageEnglish (US)
Article number19
JournalJournal of High Energy Physics
Volume2011
Issue number3
DOIs
StatePublished - Jan 1 2011

Keywords

  • Supersymmetry phenomenology

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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