  An analytical method is presented to solve generalized QCD evolution
equations for the time development of parton cascades in a nuclear environment.
Closed solutions for the spectra of produced partons with respect to the
variables time, longitudinal momentum and virtuality are obtained under some
idealizing assumptions about the composition of the nuclear medium. Several
characteristic features of the resulting parton distributions are discussed.
One of the main conclusions is that the evolution of a parton shower in medium
is dilated as compared to free space and is accompanied by an enhancement of
particle production. These effects become stronger with increasing nuclear
density.
