# The Return of the WIMP: Missing Energy Signals and the Galactic Center Excess

## TL;DR

This paper proposes extensions to a supersymmetry-based model to simultaneously explain galactic center gamma-ray and anti-proton excesses, while remaining consistent with collider and dark matter detection constraints.

## Contribution

It introduces simple model extensions involving CP violation or a light CP-odd Higgs to account for astrophysical excesses within a supersymmetric framework.

## Key findings

- Model extensions can explain gamma-ray and anti-proton excesses.
- The scenario remains consistent with current dark matter detection bounds.
- It challenges pulsar-based explanations for the galactic center excess.

## Abstract

In a recent work, we emphasized that an excess in tri-lepton events plus missing energy observed by the ATLAS experiment at the LHC could be interpreted as a signal of low energy supersymmetry. In such a scenario the lightest neutralino mass is approximately $m_\chi \simeq 60$ GeV and the direct Dark Matter detection cross section is naturally below the current bound. In this work we present simple extensions of this scenario that lead to an explanation of the gamma ray excess at the center of the galaxy observed by Fermi-LAT, as well as the anti-proton excess observed by AMS-02. These extensions include the addition of a small CP violating phase in the neutralino sector or the addition of a light CP-odd Higgs scalar. Our study is of special relevance in view of a recent analysis that casts doubt on the previously accepted preference for mili-second pulsars as the origin of the galactic center excess.