Two dark matter components in N_{DM}MSSM and dark matter extension of the minimal supersymmetric standard model and the high energy positron spectrum in PAMELA/HEAT data

摘要

We present the dark matter (DM) extension (by N) of the minimalsupersymmetric standard model to give the recent trend of the high energypositron spectrum of the PAMELA/HEAT experiments. If the trend survives byfuture experiments, the MSSM needs to be extended. Here, we minimally extendthe MSSM with one more DM component N together with a heavy lepton E, andintroduce the coupling e_R E_R^c N_R. This coupling naturally appears in theflipped SU(5) GUT models. This N_{DM}MSSM contains the discrete symmetry Z_6,and for some parameter ranges there result two DM components. For the MSSMfields, the conventional R-parity, which is a subgroup of Z_6, is preserved. Wealso present the needed parameter ranges of these additional particles.