The 750GeV diphoton excess: who introduces it?

TL;DR

This paper investigates the origin of the 750GeV diphoton excess observed at the LHC, focusing on whether the standard model top-quark significantly contributes to the loop process producing the scalar particle.

Contribution

It introduces a method to determine the top-quark's contribution to the loop in the 750GeV diphoton excess production process.

Findings

Analysis of the top-quark's role in the loop contribution.

Implications for distinguishing between standard model and new physics.

Potential to identify the particle responsible for the excess.

Abstract

Recently, both ATLAS and CMS collaborations report an excess at 750GeV in the diphoton invariant mass spectrum at 13TeV LHC. If it is a new scalar produced via loop induced gluon-gluon fusion process, it is important to know what is the particle in the loop. In this work, we investigate the possibility of determine the fraction of the contribution from the standard model top-quark in the loop.