Remarks on the Possible Existence of Stable or Semistable Charmed Particles in the Three-Triplet Model

The possibility of "charm" being a reasonably good quantum number in the three-triplet model is discussed. The physical differences between the Han-Nambu model and the $\mathrm{SUB}$ model of Cabibbo, Maiani, and Preparata are clarified and spelled out in some detail. It is argued that under a variety of circumstances the experimental detection of integrally charged, heavy (in the 2-4-BeV mass region, say), long-lived, charmed particles is quite feasible, provided that the $\mathrm{SU}\left(3\right)\mathrm{}\times \mathrm{SU}\left(3\right)\mathrm{}$″ classification scheme in either model is approximately valid. The lifetimes involved are probably in the range of ${10}^{-12\mathrm{}}$ to ${10}^{-8\mathrm{}}$ sec.