NMSSM extended with vectorlike particles and the diphoton excess at the LHC

TL;DR

This paper explores an extension of the NMSSM with vectorlike particles to explain the LHC diphoton excess, finding it can account for the excess but predicts a slightly weaker signal than observed.

Contribution

It introduces a specific NMSSM extension with vectorlike particles that can potentially explain the LHC diphoton excess.

Findings

The $10+ar{10}$ model can explain the diphoton excess.

Predicted signal strength is slightly below the observed value.

The model remains consistent with other experimental constraints.

Abstract

We investigate the parameter space of a model which extends next to minimal supersymmetric standard model (NMSSM) with the vectorlike (VL) particles. We find that the $10+\overline{10}$ model can explain the possible diphoton excess recently revealed by the ATLAS and CMS collaborations, although the predicted signal strength is a little smaller than the observed one.