Resolving Fermi, PAMELA and ATIC anomalies in split supersymmetry without R-parity

TL;DR

This paper explores how split supersymmetry without R-parity can explain cosmic ray anomalies through long-lived neutralino dark matter, avoiding fine-tuned couplings.

Contribution

It proposes a natural framework where long-lived neutralino dark matter accounts for anomalies without fine-tuning in split SUSY without R-parity.

Findings

Neutralino can be long-lived enough to explain anomalies

The model avoids extreme fine-tuning of couplings

Provides a consistent dark matter candidate in split SUSY

Abstract

A long-lived decaying dark matter as a resolution to Fermi, PAMELA and ATIC anomalies is investigated in the framework of split supersymmetry (SUSY) without R-parity, where the neutralino is regarded as the dark matter and the extreme fine-tuned couplings for the long-lived neutralino are naturally evaded in the usual approach.