Strings versus supersymmetric GUTs: can they be reconciled?

Abstract

We describe a class of supersymmetric unified models with the following properties: i) the full breaking of the gauge group is achieved by Higgs fields in the fundamental representation; ii) the correct unification of the strong and electroweak coupling constants is obtained without the need of any intermediate scale; iii) the problems of the doublet-triplet splitting and of the proton decay at dimension-5 level may receive a natural solution. The models, other than being interesting unified field theories per se, may constitute examples of string-derivable GUTs.

5 pages, report IFUP-TH 20/94

Cited by in corpus (40)

• SuSpect: a Fortran Code for the Supersymmetric and Higgs Particle Spectrum in the MSSM
• TeV Scale Superstring and Extra Dimensions
• String Theory and the Path to Unification: A Review of Recent Developments
• String GUTs
• Natural gauge-coupling unification at the string scale
• Improving the Fine Tuning in Models of Low Energy Gauge Mediated Supersymmetry Breaking
• Deconstruction, G_2 Holonomy, and Doublet-Triplet Splitting
• Dynamical GUT breaking and mu-term driven supersymmetry breaking
• The Essential Role of String-Derived Symmetries in Ensuring Proton-Stability and Light Neutrino Masses
• Towards a Systematic Construction of Realistic D-brane Models on a del Pezzo Singularity
• Baryogenesis and Gravitino Dark Matter in Gauge-Mediated Supersymmetry-Breaking Models
• Field Theory on Multi-throat Backgrounds
• Grand Unification with Three Generations in Free Fermionic String Models
• Fermion masses and mixings in a flavour symmetric GUT
• Product-Group Unification in Type IIB String Thoery
• Upper Bound of Proton Lifetime in Product-Group Unification
• $SU(5)\times SU(5)$ Unification, Seesaw Mechanism and R-Conservation
• Product Groups, Discrete Symmetries, and Grand Unification
• The Stability of the Gauge Hierarchy in $SU(5)\times SU(5)$
• String-Inspired Triplet See-Saw from Diagonal Embedding of SU(2)_L in SU(2)_A x SU(2)_B
• Unified model of fermion masses with Wilson line flavor symmetry breaking
• Vector-Like Quarks and Leptons, SU(5) $\otimes$ SU(5) Grand Unification, and Proton Decay
• Vanishing corrections on the intermediate scale and implications for unification of forces
• Family Unification with SO(10)
• SU(5)xSU(5) unification revisited
• Problem of flavour in SUSY GUT and horizontal symmetry
• String Gauge Unification and Infra-red Fixed Points in MSSM+X Models
• Small steps towards Grand Unification and the electron/positron excesses in cosmic-ray experiments
• Mass-Splitting between Haves and Have-Nots (Symmetry vs. Grand Unified Theory)
• Light GUT Triplets and Yukawa Splitting
• String scale unification in an SU(6)xSU(2) GUT
• Quark and Lepton Masses from Deconstruction
• Monopole Breaking of Chern-Weil Symmetries
• Free Fermionic Constructions of Heterotic Strings
• SU(5)xSU(5)' unification and D2 parity: Model for composite leptons
• Fermion Mass Hierarchy without Flavour Symmetry
• Supersymmetric grandunification and fermion masses
• The Paths of Unification In The GUST With The G x G Gauge Groups of E(8) x E(8)
• The flavor of product-group GUTs
• Axion Quality Straight from the GUT