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

TL;DR

This paper proposes an extension of the MSSM with an additional dark matter component and heavy lepton to explain high energy positron data, suggesting a multi-component dark matter scenario.

Contribution

It introduces a minimal extension of the MSSM with a new dark matter component and heavy lepton, motivated by high energy positron observations and GUT models.

Findings

Two dark matter components can explain PAMELA/HEAT data.

The model preserves R-parity and introduces a Z_6 symmetry.

Parameter ranges for new particles are identified.

Abstract

We present the dark matter (DM) extension (by N) of the minimal supersymmetric standard model to give the recent trend of the high energy positron spectrum of the PAMELA/HEAT experiments. If the trend survives by future experiments, the MSSM needs to be extended. Here, we minimally extend the MSSM with one more DM component N together with a heavy lepton E, and introduce the coupling e_R E_R^c N_R. This coupling naturally appears in the flipped 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 MSSM fields, the conventional R-parity, which is a subgroup of Z_6, is preserved. We also present the needed parameter ranges of these additional particles.