Di-photon excess illuminates dark matter

Mihailo Backović, Alberto Mariotti*, Diego Redigolo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Abstract: We propose a simplified model of dark matter with a scalar mediator to accommodate the di-photon excess recently observed by the ATLAS and CMS collaborations. Decays of the resonance into dark matter can easily account for a relatively large width of the scalar resonance, while the magnitude of the total width combined with the constraint on dark matter relic density leads to sharp predictions on the parameters of the Dark Sector. Under the assumption of a rather large width, the model predicts a signal consistent with ∼ 300 GeV dark matter particle and ∼ 750 GeV scalar mediator in channels with large missing energy. This prediction is not yet severely bounded by LHC Run I searches and will be accessible at the LHC Run II in the jet plus missing energy channel with more luminosity. Our analysis also considers astro-physical constraints, pointing out that future direct detection experiments will be sensitive to this scenario.

Original languageEnglish
Article number157
JournalJournal of High Energy Physics
Issue number3
StatePublished - 1 Mar 2016
Externally publishedYes


  • Beyond Standard Model
  • Cosmology of Theories beyond the SM


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