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), RMh, can be presented in the form of a function of a single variable τ, which has the physical meaning of the formation time of the hadron. This τ scaling is a function of two variables: the energy of the virtual photon ν and the fraction of that energy, z, carried by the final hadron. Moreover, RMh can be parametrized in the form of a linear polynomial a11+τa12, where the parameters a11 and a12 do not depend on ν and z.