Experimental signatures of a new dark matter WIMP

TL;DR

This paper proposes a new WIMP dark matter candidate with a mass around 72 GeV/c^2, consistent with various experimental constraints and observations, and discusses its detectability in upcoming experiments.

Contribution

It introduces a novel dark matter WIMP model that aligns with multiple observational data and differs phenomenologically from the inert doublet model.

Findings

Consistent with dark matter abundance and experimental limits.

Matches gamma-ray and antiproton excesses attributed to dark matter.

Potentially observable in future direct detection and collider experiments.

Abstract

The WIMP proposed here yields the observed abundance of dark matter, and is consistent with the current limits from direct detection, indirect detection, and collider experiments, if its mass is $\sim 72$ GeV/$c^2$. It is also consistent with analyses of the gamma rays observed by Fermi-LAT from the Galactic center (and other sources), and of the antiprotons observed by AMS-02, in which the excesses are attributed to dark matter annihilation. These successes are shared by the inert doublet model (IDM), but the phenomenology is very different: The dark matter candidate of the IDM has first-order gauge couplings to other new particles, whereas the present candidate does not. In addition to indirect detection through annihilation products, it appears that the present particle can be observed in the most sensitive direct-detection and collider experiments currently being planned.