Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter

TL;DR

This paper explores whether a light scalar dark matter particle within a supersymmetric model can explain the gamma ray excess observed at the Galactic Center, aligning with neutrino mass data and experimental constraints.

Contribution

It proposes a Higgs portal dark matter candidate in the SISM framework that accounts for the gamma ray excess while satisfying multiple experimental constraints.

Findings

Light scalar DM can explain the gamma ray excess.

The model is consistent with neutrino oscillation data.

It satisfies collider and cosmological constraints.

Abstract

The Fermi Large Area Telescope observed an excess in gamma ray emission spectrum coming from the center of the Milky Way galaxy. This data reveals that a light Dark Matter (DM) candidate of mass in the range 31-40 GeV, dominantly decaying into $b\bar b$ final state, can explain the presence of the observed bump in photon energy. We try to interpret this observed phenomena by sneutrino DM annihilation into pair of fermions in the Supersymmetric Inverse Seesaw Model (SISM). This model can also account for tiny non-zero neutrino masses satisfying existing neutrino oscillation data. We show that a Higgs portal DM in this model is in perfect agreement with this new interpretation besides satisfying all other existing collider, cosmological and low energy experimental constraints.