The Flipped SU(5) x U(1) String Model Revamped
Jul, 198910 pages
Published in:
- Phys.Lett.B 231 (1989) 65-74
- Published: 1989
Report number:
- CERN-TH-5442-89,
- CTP-TAMU-37-89,
- MIU-THP-89-42
Citations per year
Abstract: (Elsevier)
We present a refined version of our three-generation flipped ,SU(5)×U(1) string model with the following properties. • -The complete massless spectrum is derived and shown to be free of all gauge and mixed anomalies apart from a single anomalous U(1). • -The imaginary part of the dilaton supermultiplet is eaten by the anomalous U(1) gauge boson, and the corresponding D-term is cancelled by large VEVs for singlet fields that break surplus U(1) gauge factors, leaving a supersymmetric vacuum with an SU(5)×U(1) visible gauge group and an SO(10)×SO(6) hidden gauge group. • -There are sufficient Higgs multiplets to break the visible gauge symmetry down to the standard model in an essentially unique way. • -All trilinear superpotential couplings have been calculated and there are in particular some giving m t , m b , m τ ≠0. • -A renormalization group analysis shows that m t <190 GeV and m b ≅3 m τ . • -Light Higgs doublets are split automatically from heavy Higgs triplets, leaving no residual dimension-five operators for baryon decay, and the baryon lifetime τ B ∼ 2×10 34±2 yr. • -There are no tree-level flavour-changing neutral currents, but μ → eγ may occur at a detectable level: B ( μ → eγ ) ∼ 10 −11 −10 −14 .- MODEL: STRING
- SUPERSYMMETRY
- GRAND UNIFIED THEORY: SU(5) X U(1)
- FERMION: FLAVOR
- MASS SPECTRUM
- RENORMALIZATION GROUP
- QUARK: MASS
- MASS: QUARK
- SYMMETRY BREAKING
- GROUP THEORY: REPRESENTATION
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