
A static model is considered in which all heavy particles are compounded out of two basic units, taken here to be the $\ensuremath{\Lambda}$ and nucleon $N$ (and/or the cascade particle $\ensuremath{\Xi}$). The model suggests the existence of some unstable particle states accessible to experiment: the $\ensuremath{\rho}$ meson, a boson with $I=0$; the ${\ensuremath{\Lambda}}^{**}$, a highly excited $I=0$ state of the $\ensuremath{\Lambda}$; the $Z$ hyperon unstable against rapid decay by $Z\ensuremath{\rightarrow}K+N$. Without artificial assumption the model directly indicates that in the present strangeness classification no metastable $V$ particles exist beyond those already known. The model is compatible with and somewhat favors the assumption of a high degree of symmetry between $N$ and $\ensuremath{\Xi}$. Its general tenor is thus to emphasize the charge displacement $a=q\ensuremath{-}{I}_{z}$ as a physically significant parameter rather than the strangeness $S$. An unavoidable implication of the model is that all heavy particles have comparable interaction strengths, apparent exceptions being possible over limited energy ranges. The model provides a vehicle for study of the parity doublet scheme, which introduces greater complication in return for an added flexibility at present unnecessary in the model.
Quantum Theory
Quantum Theory
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