Application of the Two-Scale Model to the HERMES Data on Nuclear Attenuation

The Two-Scale Model and its improved version were used to perform the fit to the HERMES data for ν (the virtual photon energy) and z (the fraction of ν carried by hadron) dependencies of nuclear multiplicity ratios for π and π mesons electro-produced on two nuclear targets (N and Kr). The quantitative criterium χ was used for the first time to analyse the results of the model fit to the nuclear multiplicity ratios data. The two-parameter’s fit gives satisfactory agreement with the HERMES data. Best values of the parameters were then used to calculate the νand z dependencies of nuclear attenuation for π, K, K and p̄ produced on Kr target, and also make a predictions for ν, z and the Q (the photon virtuality) dependencies of nuclear attenuation data for those identified hadrons and nuclea, that will be published by HERMES.