Indirect signature of dark matter with the diphoton resonance at 750 GeV

TL;DR

This paper explores a new axion-like bosonic portal model linking a 750 GeV diphoton resonance to dark matter, analyzing collider and cosmic-ray data to identify potential signatures and parameter space.

Contribution

It introduces a novel portal model connecting the 750 GeV resonance to dark matter and assesses its implications using collider and cosmic-ray observations.

Findings

Preferred parameter space identified from LHC data

Dark matter signatures constrained by gamma-ray searches

Future gamma-ray observations could further test the model

Abstract

Motivated by the recently reported diphoton resonance at 750 GeV, we study a new axion-like bosonic portal model of dark matter physics. When the resonance particle is identified as the pseudo-scalar mediator, via which the standard model sector would interact with the dark matter sector, the data from collider physics would provide profound implications to dark matter phenomenology. In this paper, we first identify the preferred parameter space of the suggested portal model from the results of the LHC run with $\sqrt{s}=13$ TeV, and then we examine the dark matter signature taking into account the data from cosmic-ray experiments including Fermi-LAT dwarf galaxy $\gamma$-ray search, HESS $\gamma$-line search, and future CTA diffuse $\gamma$-ray and $\gamma$-line searches.