Relativistic Lagrangian Field Theory for Composite Systems
- 25 July 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 171 (5), 1811-1824
- https://doi.org/10.1103/PhysRev.171.1811
Abstract
It is shown that infinite-component field theories provide a useful alternative to the Bethe-Salpeter equation as a fully relativistic treatment of composite systems. Scattering amplitudes obtained by models of this type satisfy both Mandelstam analyticity and conspiracy requirements. Current algebras are saturated with a combination of discrete and continuous spectra. Most of the paper is devoted to a special example, for which it is found that the mass spectrum has a discrete part (bound states) and a continuous part (scattering states); that the metric in physical Hilbert space is positive definite; and that vertex functions and scattering amplitudes are analytic functions of and , with singularities at the same locations as in local field theory. The role of "spacelike solutions" is studied in detail, with some surprising results.
Keywords
This publication has 30 references indexed in Scilit:
- Feynman Rules for ReggeonsPhysical Review B, 1968
- Infinite Multiplets and Crossing Symmetry. I. Three-Point AmplitudesPhysical Review B, 1967
- Transition Form Factors in the H AtomPhysical Review B, 1967
- Diseases of Infinite-Component Field TheoriesPhysical Review B, 1967
- Infinite Multiplets and the Hydrogen AtomPhysical Review B, 1967
- Infinite Multiplets and Local FieldsPhysical Review B, 1967
- Calculation of Relativistic Transition Probabilities and Form Factors from Noncompact GroupsPhysical Review B, 1967
- Electric-Charge Form Factor According toPhysical Review Letters, 1966
- Some remarks on the Bethe-Salpeter normalization propertiesIl Nuovo Cimento A (1971-1996), 1965
- Space-Time Model of Elementary Particles and Unitary Symmetry. I: General Foundation and SymmetryProgress of Theoretical Physics, 1965