Quarks and Leptons as Quasi Nambu-Goldstone Fermions
Dec, 1982
7 pages
Published in:
- Phys.Lett.B 124 (1983) 67
- Published: 1983
Report number:
- MPI-PAE/PTh 80/82
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Abstract: (Elsevier)
We discuss a new idea for constructing composite quarks and leptons which have (approximately) vanishing mass. They are associated with fermionic partners of Goldstone bosons arising from the spontaneous breakdown of an internal symmetry G f in a supersymmetric preon theory. For G f = SU(5) being broken to SU(3) × U(1) em there arise as quasi Goldstone fermions, naturally and unequivocally, precisely the quarks and leptons of one family. The dynamics of these quasi Goldstone fermions is explored by constructing a general supersymmetric nonlinear effective lagrangian. By means of a reduced model, we show that the first nontrivial interactions of the quasi Goldstone fermions can give rise, in an effective way, to the weak interactions. Issues connected with the incorporation of families in the scheme and the generation of masses, as well as the possible structure of the underlying preon theory are briefly discussed.Note:
- Dedicated to memory of J.J. Sakurai
- QUARK: COMPOSITE
- LEPTON: COMPOSITE
- SUPERSYMMETRY
- SPONTANEOUS SYMMETRY BREAKING
- SYMMETRY: SU(5)
- FIELD THEORY: NONLINEAR
- FIELD THEORY: EFFECTIVE LAGRANGIANS
- FIELD THEORY: MASS GENERATION
- MASS GENERATION: FIELD THEORY
- FERMION: GOLDSTONE PARTICLE
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