Sneutrino Dark Matter: Symmetry Protection and Cosmic Ray Anomalies

TL;DR

This paper proposes a supersymmetric model with sneutrino dark matter that naturally explains cosmic ray anomalies observed by PAMELA through specific decay channels, while also addressing neutrino masses and symmetry breaking.

Contribution

It introduces a Higgs-philic U(1)' extension of the MSSM that naturally generates the mu parameter and neutrino masses, providing a novel framework for dark matter and cosmic ray observations.

Findings

Sneutrino decays can account for PAMELA's positron excess.

The model naturally explains neutrino masses and mu parameter generation.

Fits cosmic ray data without conflicting with other observations.

Abstract

We present an R-parity conserving model of sneutrino dark matter within a Higgs-philic U(1)' extension of the minimal supersymmetric standard model. In this theory, the mu parameter and light Dirac neutrino masses are generated naturally upon the breaking of the U(1)' gauge symmetry. The leptonic and hadronic decays of sneutrinos in this model, taken to be the lightest and next-to-lightest superpartners, allow for a natural fit to the recent results reported by the PAMELA experiment.