Dynamical Supersymmetries in Nuclei

67B, 84 (1977). A similar picture was independently suggested by N. N. Nikolaev and S. Pokorski, Phys. Lett. 80B, 290 (1979); N. N. Nikolaev and A. Ya. Ostapchuck, CERN Report No. TH-2575, 1978 (to be published). However, their model rests heavily on details of a specific quark recombination model, it is not applicable to lepton production, and their predictions involve a free choice of functions and adjustable parameters. ~We assume that quarks can propagate long distances through the nucleus as free quarks. We have not addressed ourselves to the problem of what is the mechanism that makes this possible, whereas confinement distances are believed to be of the order of nucleon dimensions. The answer to this problem has to wait first for the solution of the confinement problem. It is well known both theoretically (see, for instance, Ref. 6 and references therein) and experimentally (lack of significant cascading within nuclei) that formation times of large x particles are long compared with nuclear dimensions.