LHC signatures of the constrained exceptional supersymmetric standard model

Abstract

We discuss two striking Large Hadron Collider (LHC) signatures of the constrained version of the exceptional supersymmetric standard model (cE 6 SSM), 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 E 6 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 cE 6 SSM 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.

Constrained exceptional supersymmetric standard model with a Higgs signal near 125 GeV

“…In Ref. [15] the impact of exotics' decay width was studied and a considerable impact was found for two test case benchmarks. Based on the work in Ref.…”

“…The presence of a Z 0 boson and exotic quarks predicted by the E 6 SSM provides spectacular new physics signals at the LHC which were discussed in Refs. [10,11,[13][14][15][16].…”

“…For a detailed discussion of this exotic quark production, see Ref. [15], where benchmark C contains exotic quarks with a very similar mass.…”

“…Previous studies of the constrained exceptional supersymmetric standard model (cE 6 SSM) have focused on regions of cE 6 SSM parameter space which could have led to a discovery with the first LHC data [14] via the characteristic LHC signatures of the model [15]. These ''early'' benchmark points are by now excluded by LHC searches for supersymmetry (SUSY) and Z 0 bosons.…”

Exotic Higgs Decays in U(1) Extensions of the MSSM

“…Different aspects of the phenomenology of these E 6 inspired supersymmetric (SUSY) models have been extensively studied in [1,2,3,4,5,6,7,8,9,10,11,12,13].…”