PAMELA's cosmic positron from decaying LSP in SO(10) SUSY GUT

Details PAMELA's cosmic positron from decaying LSP in SO(10) SUSY GUT PAMELA's cosmic positron from decaying LSP in SO(10) SUSY GUT

2010-10-21

arxiv.org/abs/1010.4379v1

J.Phys.Conf.Ser.259:012103,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, Talks presented in PASCOS, SUSY, and COSMO/CosPA in 2010

Scientific paper

10.1088/1742-6596/259/1/012103

We propose two viable scenarios explaining the recent observations on cosmic positron excess. In both scenarios, the present relic density in the Universe is assumed to be still supported by thermally produced WIMP or LSP (\chi). One of the scenarios is based on two dark matter (DM) components (\chi,X) scenario, and the other is on SO(10) SUSY GUT. In the two DM components scenario, extremely small amount of non-thermally produced meta-stable DM component [O(10^{-10}) < n_X /n_\chi] explains the cosmic positron excess. In the SO(10) model, extremely small R-parity violation for LSP decay to e^\pm is naturally achieved with a non-zero VEV of the superpartner of one right-handed neutrino (\tilde{\nu}^c) and a global symmetry.

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