Phenomenological Consequences of the Constrained Exceptional Supersymmetric Standard Model

TL;DR

This paper explores the phenomenological implications of the constrained E6SSM, a supersymmetric model with an extra U(1) symmetry, predicting exotic particles and potential signals at the LHC.

Contribution

It introduces a constrained version of the E6SSM, analyzing its parameter space and predicting a hierarchical spectrum with observable exotic particles.

Findings

Large parameter space with correct gauge symmetry breaking

Heavy scalars and light gauginos predicted

Potential for observable exotic particles at LHC

Abstract

The Exceptional Supersymmetric Standard Model (E$_6$SSM) provides a low energy alternative to the MSSM, with an extra gauged U(1)$_N$ symmetry, solving the $\mu$-problem of the MSSM. Inspired by the possible embedding into an E$_6$ GUT, the matter content fills three generations of E$_6$ multiplets, thus predicting exciting exotic matter such as diquarks or leptoquarks. We present predictions from a constrained version of the model (cE$_6$SSM), with a universal scalar mass $m_0$, trilinear mass $A$ and gaugino mass $M_{1/2}$. We reveal a large volume of the cE$_6$SSM parameter space where the correct breakdown of the gauge symmetry is achieved and all experimental constraints satisfied. We predict a hierarchical particle spectrum with heavy scalars and light gauginos, while the new exotic matter can be light or heavy depending on parameters. We present representative cE$_6$SSM scenarios, demonstrating that there could be light exotic particles, like leptoquarks and a U(1)$_N$ Z' boson, with spectacular signals at the LHC.