The "Dark disk" model in the light of DAMPE experiment

TL;DR

This paper evaluates the dark disk model for dark matter as an explanation for cosmic ray positron excess, using DAMPE data to show improved data fitting and addressing gamma-ray overproduction issues.

Contribution

It demonstrates that the dark disk model can better fit DAMPE data and mitigate gamma-ray overproduction problems compared to simpler dark matter models.

Findings

Dark disk model improves fit to DAMPE data

Addresses gamma-ray overproduction issue

Supports dark matter origin of positron excess

Abstract

There are a lot of models considering the Dark Matter (DM) to be the origin of cosmic ray (CR) positron excess. However, they face an obstacle in the form of gamma-rays. Simple DM models tend to overproduce gamma-rays, leading to contradiction with isotropic gamma-ray background (IGRB). The <<dark disk>> model has been proposed to alleviate this contradiction. This work considers results of DAMPE experiment in the framework of the disk model. It is obtained that such a framework allows improving data fit considerably.