Symmetries and Nonsymmetries of the Relativistic Quark Model
- 15 September 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 6 (6), 1781-1796
- https://doi.org/10.1103/physrevd.6.1781
Abstract
The dynamical successes of the relativistic quark model are separated from those due to symmetry arguments. Particular attention is paid to the example of the , meson decays. A relativistically invariant coplanar form of U(3) ⊗ U(3) is found to explain all predictions of the relativistic quark model for decays within a given multiplet except (a) the absence of spin-orbit effects and (b) relations between different partial waves, e.g., in . The coplanar symmetry is expected to be as good as the quark-model classification scheme itself. It preserves most of the better predictions of , while avoiding some that are questionable. Some of the "good" predictions preserved are , , and . Questionable predictions of avoided by the coplanar symmetry include the selection rules , . A model of hadron decays which assumes them to occur via production of a pair is consistent with (but more specific than) the coplanar symmetry.
Keywords
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