Space-time evolution of hadronization in cold nuclear matter

In this work I continue the investigation of the space-time evolution of the hadronization process on the basis of the semi-inclusive deep inelastic scattering data on nuclei obtained by the HERMES experiment at the Deutsches Elektronen Synchrotron (DESY). Results of previous articles from our group, together with the analysis performed in this work, show that a ratio of multiplicities for the nucleus and deuterium (per nucleon), R-M(h), can be presented in the form of a function of a single variable tau, which has the physical meaning of the formation time of the hadron. This tau scaling is a function of two variables: the energy of the virtual photon nu and the fraction of that energy, z, carried by the final hadron. Moreover, R-M(h) can be parametrized in the form of a linear polynomial a(11)+tau a(12), where the parameters a(11) and a(12) do not depend on nu and z.