Three generations in the fermionic construction

1995/10/31 by Shyamoli Chaudhuri, S. Chaudhuri, George Hockney +3 · 4 citations
Mathematics · Physics and Astronomy · #Algebraic structures and combinatorial models #Black Holes and Theoretical Physics #Coupling (piping) #Fermion #Gauge (firearms) #Gauge theory #Hypercharge #Orbifold #Quantum Chromodynamics and Particle Interactions #String (physics) #String theory #hep-th

paper · pdf · doi:10.1016/0550-3213(96)00142-3

published as Nucl.Phys. B469 (1996) 357-386 · harvmac, 51 pages

arxiv created 1995/11/01 · openalex publication_date 1996/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We obtain three generation SU(3)_c X SU(2)_L X U(1)_Y string models in all of the exactly solvable (0,2) constructions sampled by fermionization. None of these examples, including those that are symmetric abelian orbifolds, rely on the Z₂ X Z₂ orbifold underlying the NAHE basis. We present the first known three generation models for which the hypercharge normalization, k₁, takes values smaller than that obtained from an SU(5) embedding, thus lowering the effective gauge coupling unification scale. All of the models contain fractional electrically charged and vectorlike exotic matter that could survive in the light spectrum.

Citations

• Z2×Z2 orbifold compactification as the origin of realistic free fermionic models
• Moduli space of Chaudhuri-Hockney-Lykken strings
• Fayet-Iliopoulos terms in string theory
• String consistency for unified model building
• Custodial nonabelian gauge symmetries in realistic superstring derived models

Cited by

• R parity from string compactification
• TOWARD CLASSIFICATION OF THE REALISTIC FREE-FERMIONIC SUPERSTRING MODELS
• D-term spectroscopy in realistic heterotic-string models
• Grand unification models from SO(32) heterotic string