Quarks at the Ends of the String
Oct, 197552 pages
Published in:
- Phys.Rev.D 13 (1976) 1744-1760
Report number:
- SLAC-PUB-1680,
- COO-3075-121
Citations per year
Abstract: (APS)
We develop a technique for attaching quark quantum numbers to world lines joined by relativistic strings. We are able to describe spin-0 and spin-½ U(n)-symmetric quarks attached to world lines. One spin-½ theory based on the Dirac equation yields a classical particle with helical motion, interpretable as Zitterbewegung. Another spin-½ model has no helical motion, but yields an algebra resembling that of super-symmetry. Motivated by duality diagrams and some general properties of quarkgluon models, we then construct quark-string models of mesons and baryons. The analysis of the meson model with unequal quark masses implies a stringlike spectrum with broken trajectory intercepts. A simple baryon model suggests a dynamical reason for diquark configurations in the lowest states. Physical weak and electromagnetic currents for the quark-string system follow from a minimal-coupling scheme as in gauge field theories.- QUARK: QUANTUM NUMBER
- QUANTUM NUMBER: QUARK
- MODEL: STRING
- SYMMETRY: U(N)
- QUARK: SPIN
- SPIN: QUARK
- QUARK: SPINLESS
- SYMMETRY: INTERNAL
- Dirac equation
- FIELD THEORY: SUPERSYMMETRY
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