The Constrained Exceptional Supersymmetric Standard Model

TL;DR

This paper introduces a constrained version of the E6SSM, called cE6SSM, with a universal high-energy parameter set, and analyzes its particle spectrum and potential signals at the LHC through numerical RG methods.

Contribution

It develops the cE6SSM model with universal high-energy parameters, derives its RG equations, and explores its low-energy phenomenology and collider signatures.

Findings

Light gluino, neutralinos, and chargino predicted

Exotic quarks and squarks can be relatively light

Distinctive LHC signals identified

Abstract

We propose and study a constrained version of the Exceptional Supersymmetric Standard Model (E6SSM), which we call the cE6SSM, based on a universal high energy scalar mass m_0, trilinear scalar coupling A_0 and gaugino mass M_{1/2}. We derive the Renormalisation Group (RG) Equations for the cE6SSM, including the extra U(1)_{N} gauge factor and the low energy matter content involving three 27 representations of E6. We perform a numerical RG analysis for the cE6SSM, imposing the usual low energy experimental constraints and successful Electro-Weak Symmetry Breaking (EWSB). Our analysis reveals that the sparticle spectrum of the cE6SSM involves a light gluino, two light neutralinos and a light chargino. Furthermore, although the squarks, sleptons and Z' boson are typically heavy, the exotic quarks and squarks can also be relatively light. We finally specify a set of benchmark points which correspond to particle spectra, production modes and decay patterns peculiar to the cE6SSM, altogether leading to spectacular new physics signals at the Large Hadron Collider (LHC).