The 750 GeV Diphoton excess in a $U(1)$ hidden symmetry model

TL;DR

This paper proposes an $U(1)$ hidden symmetry extension of the Standard Model to explain the 750 GeV diphoton excess observed at the LHC, identifying viable parameter space and potential new signals.

Contribution

It introduces a minimal $U(1)$ extension of the Standard Model that can account for the 750 GeV diphoton resonance and predicts observable signals at the LHC.

Findings

Viable parameter space for the $U(1)$ model explaining the excess

Predicted new signals at the current LHC run

Compatibility with existing experimental constraints

Abstract

Recent results from the experimental collaborations at LHC give hints of a resonance in the diphoton channel at an invariant mass of 750 GeV. We show that such a scalar resonance would be possible in an $U(1)$ extension of the SM where the extended symmetry is hidden and yet to be discovered. We explore the possibilities of accommodating this excess by introducing a minimal extension to the matter content and highlight the parameter space that can accommodate the observed diphoton resonance in the model. The model also predicts new interesting signals that may be observed at the current LHC run.