Decaying dark matter with heavy axino

Abstract

A TeV scale decaying dark matter chiral multiplet N is introduced in addition to the minimal supersymmetric standard model(MSSM). For a calculable abundance of N, we introduce heavy axino decaying to N and MSSM particles including the lightest supersymmetric particle(LSP). In the scenario that heavy axino, once dominating the energy density of the universe, decays after the LSP decouples, it is possible to estimate the relative cosmic abundances of N and the LSP. Dimension 6 interactions allow the lifetime of the fermionic or the bosonic superpartner of N in the 10^{27} s range to be compatible with the recent astrophysical bounds. A diagrammatic strategy obtaining a suppression factor 1/M^2 is also given.

5 pages with 2 figures

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• Universally Leptophilic Dark Matter From Non-Abelian Discrete Symmetry
• Mixing of axino and goldstino, and axino mass
• SU(5)_{flip} x SU(5)' from Z_{12-I}
• Constraining WIMP magnetic moment from CDMS II experiment
• Decaying Dark Matter from Dark Instantons
• Decaying Dark Matter in Supersymmetric Model and Cosmic-Ray Observations
• A Froggatt-Nielsen Model for Leptophilic Scalar Dark Matter Decay