Diphoton Excess as a Hidden Monopole

TL;DR

This paper proposes a model with a hidden monopole from a strongly-interacting U(1) gauge symmetry that explains the 750-GeV diphoton excess observed by ATLAS and CMS, avoiding relics problematic for BBN.

Contribution

It introduces a novel hidden monopole model that accounts for the diphoton excess through monopole resonance, with a unique low-energy spectrum free of baryons.

Findings

Monopole resonance explains the diphoton excess.

Model predicts no unwanted relics around BBN.

Diphoton excess can be attributed to monopole production and decay.

Abstract

We provide a theory with a monopole of a strongly-interacting hidden U(1) gauge symmetry that can explain the 750-GeV diphoton excess reported by ATLAS and CMS. The excess results from the resonance of monopole, which is produced via gluon fusion and decays into two photons. In the low energy, there are only mesons and a monopole in our model because any baryons cannot be gauge invariant in terms of strongly interacting Abelian symmetry. This is advantageous of our model because there is no unwanted relics around the BBN epoch.