  The method used and results obtained are described for calculation of the
cross section for the pion diffractive dissociation into two jets. The main new
qualitative result is that the distribution of longitudinal momenta for jets is
not simply proportional to the profile of the pion wave function
  $\phi_{\pi}(x)$, but depends on it in a complicated way. In particular, it is
shown that under conditions of the E791 experiment, the momentum distribution
of jets is similar in its shape for the asymptotic and CZ wave functions. It is
concluded therefore that, unfortunately, the process considered is really
weakly sensitive to the profile of the pion wave function, and the accuracy of
data is insufficient to distinguish clearly between different models of
$\phi_{\pi}(x)$. Comparison with the results of other papers on this subject is
given.
