2011/03/31 by Rhys Davies, John March-Russell, Matthew McCullough · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Electroweak interaction #Gauge (firearms) #Grand Unified Theory #Higgs boson #Minimal Supersymmetric Standard Model #Neutralino #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Proton decay #Standard Model (mathematical formulation) #Supersymmetry #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep04(2011)108
published as JHEP 1104:108,2011 · 23 pages
openalex publication_date 2011/04/01 · arxiv created 2011/04/11 · arxiv updated 2011/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a supersymmetric extension of the Standard Model in which only one electroweak doublet acquires a vacuum expectation value and gives mass to Standard Model fermions. As well as the novel accommodation of a Standard Model Higgs within a supersymmetric framework, this leads to a very predictive model, with some advantages over the MSSM. In particular, problems with proton decay, flavour changing neutral currents and large CP violation are ameliorated, primarily due to the presence of an anomaly-free R-symmetry. Since supersymmetry must be broken at a low scale, gravity-mediated effects which break the R-symmetry are naturally small. The R-symmetry requires the presence of adjoint chiral superfields, to give Dirac masses to the gauginos; these adjoints are the only non-MSSM fields in the visible sector. The LSP is a very light neutralino, which is mostly bino. Such a light neutralino is not in conflict with experiment, and is a striking prediction of the minimal model. Additional scenarios to raise the mass of this neutralino to the weak scale are also outlined. Prospects for discovery at the LHC are briefly discussed, along with viable scenarios for achieving gauge-coupling unification.