Cosmic Ray Spectra in Nambu-Goldstone Dark Matter Models

TL;DR

This paper explores how Nambu-Goldstone dark matter models can explain cosmic ray excesses observed by PAMELA and Fermi, predicting specific gamma-ray signatures and fitting data with dark matter masses of 3 TeV and 6 TeV.

Contribution

It introduces Nambu-Goldstone dark matter models as a viable explanation for cosmic ray excesses and predicts distinctive gamma-ray spectra within these models.

Findings

Dark matter annihilation fits PAMELA and Fermi data with 3 TeV mass.

Decaying dark matter fits data with 6 TeV mass.

Models predict unique gamma-ray signatures.

Abstract

We discuss the cosmic ray spectra in annihilating/decaying Nambu-Goldstone dark matter models. The recent observed positron/electron excesses at PAMELA and Fermi experiments are well fitted by the dark matter with a mass of 3TeV for the annihilating model, while with a mass of 6 TeV for the decaying model. We also show that the Nambu-Goldstone dark matter models predict a distinctive gamma-ray spectrum in a certain parameter space.