Investigating the jet activity accompanying the production at the LHC of a massive scalar particle decaying into photons

TL;DR

This paper analyzes jet activity associated with a new scalar particle produced via gluon fusion at the LHC, highlighting how large new physics contributions lead to extra jet activity in diphoton events.

Contribution

It introduces a detailed study of jet activity in scalar resonance production, linking jet signatures to underlying loop-induced interactions involving heavy colored states.

Findings

Large new physics contributions increase non-standard diphoton events with extra jets.

Jet activity can provide insights into the physics behind the scalar resonance.

The study covers a wide mass window for the scalar particle.

Abstract

We study the jet activity that accompanies the production by gluon fusion of a new physics scalar particle decaying into photons at the LHC. In the considered scenarios, both the production and decay mechanisms are governed by loop-induced interactions involving a heavy colored state. We show that the presence of large new physics contributions to the inclusive diphoton invariant-mass spectrum always implies a significant production rate of non-standard diphoton events containing extra hard jets. We investigate the existence of possible handles that could provide a way to obtain information on the underlying physics behind the scalar resonance, and this in a wide mass window.