Implications of inelastic rescatterings for pion double charge exchange onnuclei

Different aspects of the Gribov-Glauber approach for the calculation of inc lusive pion double charge exchange (DCX) cross sections on nuclei are inves tigated. Recently, we have shown that inelastic rescatterings (IRs) with tw o land more) pions in the intermediate states give an important contributio n to the process of DCX at energies above similar to 0.6 GeV. In this paper we use the one-pion exchange model to study in detail the amplitude of two -pion production. This allows us to verify theoretical assumptions made in the previous paper and to predict the forward inclusive pion DCX cross sect ion at energies greater than or similar to1 GeV, where IRs dominate over th e conventional DCX mechanism of two sequential single-charge exchanges.