PAMELA/ATIC anomaly from exotic mediated dark matter decay

We discuss dark matter decay mediated by exotically charged particles (exotics) in a supersymmetric model with two dark matter (DM) components: one is the (bino-like) lightest supersymmetric particle (LSP) chi, and the other is a newly introduced meta-stable neutral singlet N. N decays to chi(e+)e(-) via a dimension 6 operator induced by a penguin-type one loop diagram with the life time of 10(26) sec., explaining energetic cosmic e(+/-) excess observed recently by PAMELA and ATIC/PPB-BETS. The superheavy masses of exotics (similar to 10(15-16) GeV) are responsible for the longevity of N. The superpartner of N develops the vacuum expectation value (VEV) of order TeV so that the DM N achieves the desired mass of 2TeV. By the VEV, the U(1)(R) symmetry is broken to the discrete Z(2) symmetry, which is identified with the matter parity in the minimal supersymmetric standard model (MSSM). Since we have the two DM components, even extremely small amount of N [O(10(-10)) less than or similar to (n(N)/n(chi))] could account for the observed positron flux with relatively light exotics' masses [10(12) GeV less than or similar to M-exo less than or similar to 10(16) GeV].