Phenomenological consequences of the constrained exceptional supersymmetric standard model

The Exceptional Supersymmetric Standard Model (E ₆SSM) provides a low energy alternative to the MSSM, with an extra gauged U(1) _N symmetry, solving the μ-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 ₆SSM), with a universal scalar mass m ₀, trilinear mass A and gaugino mass M _1/2. We reveal a large volume of the cE ₆SSM 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 ₆SSM scenarios, demonstrating that there could be light exotic particles, like leptoquarks and a U(1) _N Z′ boson, with spectacular signals at the LHC.