Unified Approach to Jet Processes in Quantum Chromodynamics

We have analyzed in the leading-logarithm approximation a closed set of equations, the solution of which describes correctly the processes $e^{+}+e^{-}\to \mathrm{anything}$, $e+h\to e+\mathrm{anything}$, and $e^{+}+e^{-}\to h+\mathrm{anything}$. This approach allows us to justify clearly the application of the renormalization group and the so-called factorization property. Since the technique is basically a skeleton expansion, it should be useful to give a unified description of all jet processes.