$E_6$ Inspired SUSY Benchmarks, Dark Matter Relic Density and a 125 GeV Higgs

TL;DR

This paper investigates an $E_6$ inspired SUSY model with an extra $U(1)_N$ gauge symmetry, presenting benchmark scenarios consistent with a 125 GeV Higgs, dark matter relic density, and LHC constraints, predicting observable signals in future experiments.

Contribution

It introduces specific benchmark points in an $E_6$ inspired SUSY model that satisfy Higgs, dark matter, and collider constraints, highlighting distinctive experimental signatures.

Findings

Benchmark points with a 125 GeV Higgs and heavy sparticles.

Predicted large dark matter detection cross sections near current limits.

Distinctive signatures for LHC run II that differentiate this model from simpler SUSY models.

Abstract

We explore the relic density of dark matter and the particle spectrum within a constrained version of an $E_6$ inspired SUSY model with an extra $U(1)_N$ gauge symmetry. In this model a single exact custodial symmetry forbids tree-level flavor-changing transitions and the most dangerous baryon and lepton number violating operators. We present a set of benchmark points showing scenarios that have a SM-like Higgs mass of 125 GeV and sparticle masses above the LHC limits. They lead to striking new physics signatures which may be observed during run II of the LHC and can distinguish this model from the simplest SUSY extensions of the SM. At the same time these benchmark scenarios are consistent with the measured dark matter abundance and necessarily lead to large dark matter direct detection cross sections close to current limits and observable soon at the XENON1T experiment.