LHC Signatures of the Constrained Exceptional Supersymmetric Standard Model

TL;DR

This paper explores distinctive LHC signatures of the constrained exceptional supersymmetric standard model, focusing on exotic fermions and Z' gauge boson decays, providing calculations, benchmark points, and implications for early discovery.

Contribution

It introduces specific LHC signatures of the cE6SSM, including production and decay patterns of exotic fermions and Z' bosons, with detailed calculations and benchmark scenarios.

Findings

D-fermions have calculable production cross sections and decay patterns.

Z' boson width can increase due to decays into exotic states.

Benchmark points suggest potential for early LHC discovery.

Abstract

We discuss two striking Large Hadron Collider (LHC) signatures of the constrained version of the exceptional supersymmetric standard model (cE6SSM), based on a universal high energy soft scalar mass m_0, soft trilinear coupling A_0 and soft gaugino mass M_{1/2}. The first signature we discuss is that of light exotic colour triplet charge 1/3 fermions, which we refer to as D-fermions. We calculate the LHC production cross section of D-fermions, and discuss their decay patterns. Secondly we discuss the E6 type U(1)_N spin-1 Z' gauge boson and show how it may decay into exotic states, increasing its width and modifying the line shape of the dilepton final state. We illustrate these features using two representative cE6SSM benchmark points, including an "early LHC discovery" point, giving the Feynman rules and numerical values for the relevant couplings in order to facilitate further studies.