Decaying Hidden Gaugino as a Source of PAMELA/ATIC Anomalies

TL;DR

This paper proposes a model where a decaying hidden gaugino dark matter explains cosmic-ray anomalies observed by PAMELA and ATIC, fitting the positron and electron data without excess antiprotons.

Contribution

It introduces a scenario where a U(1) hidden gaugino decays into leptons, providing a novel explanation for cosmic-ray anomalies.

Findings

Decaying hidden gaugino can explain PAMELA/ATIC positron/electron excesses.

Model avoids overproduction of antiprotons in cosmic rays.

Dark matter decay rate consistent with observed anomalies.

Abstract

We study a scenario that a U(1) hidden gaugino constitutes the dark matter in the Universe and decays into a lepton and slepton pair through a mixing with a U(1)B-L gaugino. We find that the dark-matter decay can account for the recent PAMELA and ATIC anomalies in the cosmic-ray positrons and electrons without an overproduction of antiprotons.