Diphoton decay for a 750 GeV scalar boson in a $SU(6)\otimes U(1)_{X}$ model

TL;DR

This paper introduces an anomaly-free $SU(6) imes U(1)_X$ GUT model featuring a 750 GeV scalar that can decay into two photons, explaining recent experimental signals through one-loop processes involving exotic particles.

Contribution

The paper presents a novel $SU(6) imes U(1)_X$ GUT model that naturally incorporates a 750 GeV scalar and exotic particles, providing a new theoretical framework for diphoton signals.

Findings

Allowed exotic quark masses from 900 GeV to 3 TeV.

Model compatible with ATLAS and CMS diphoton data.

Explains diphoton decay via one-loop processes with exotic particles.

Abstract

We propose a new $SU(6)\otimes U(1)_{X}$ GUT model free from anomalies, with a 750 GeV scalar candidate which can decay into two photons, compatible with the recent diphoton signal reported by ATLAS and CMS collaborations. This model gives masses to all fermions and may explain the 750GeV signal through one loop decays to $\gamma\gamma$ with charged vector and charged Higgs bosons, as well as up- and electron-like exotic particles that arise naturally from the condition of cancellation of anomalies of the $SU(6)\otimes U(1)_{X}$ group. We obtain, for different width approximations, allowed mass regions from 900 GeV to 3 TeV for the exotic up-like quark, in agreement with ATLAS and CMS collaborations data.