Naive quark-pair—creation model and baryon decays

Abstract

It is shown that the naive quark-pair---creation model, perhaps the simplest generalization of the additive quark model treating all the hadrons as composite, correctly describes the observed centrifugal-barrier effect in the baryon decays in which more than one partial wave contributes. Good agreement is found with the partial-wave analysis of Brody et al. of ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\Delta}}^{\ensuremath{-}}$ in the 1690-MeV mass region. Comparison is made with the previous unsuccessful $\mathrm{SU}{(6)}_{W}$ predictions and with the work of Petersen and Rosner.