Revisiting Scalar Quark Hidden Sector in Light of 750-GeV Diphoton Resonance

TL;DR

This paper revisits a scalar quark hidden sector model to explain the 750-GeV diphoton excess, predicting associated signatures and potential dark matter connections at future colliders.

Contribution

It demonstrates the model's ability to explain the diphoton excess and explores the implications of hidden strong dynamics for collider signatures and dark matter.

Findings

Model explains 750-GeV diphoton excess

Predicts TeV-scale charged states and signatures

Links hidden dynamics to dark matter

Abstract

In this short note, we revisit the model of a CP-even singlet scalar resonance proposed in arXiv:1507.02483, where the resonance appears as the lightest composite state made of scalar quarks participating in hidden strong dynamics. We show that the model can consistently explain the excess of diphoton events with an invariant mass around 750GeV reported by both the ATLAS and CMS experiments. We also discuss the nature of the charged composite states in the TeV range which accompany to the neutral scalar. Due to inseparability of the dynamical scale and the mass of the resonance, the model also predicts signatures associated with the hidden dynamics such as leptons, jets along with multiple photons at future collider experiments. We also associate the TeV-scale dynamics behind the resonance with an explanation of dark matter.