Abstract
The inclusive pion double charge exchange (DCX) on light nuclei at intermediate energies T0=0.59, 0.75 and 1.1 GeV was studied recently in the ITEP experiment on π−A interactions. The differential cross sections of these processes decrease with energy rather weakly and exceed the theoretical prediction within the conventional sequential single charge exchange mechanism with neutral pion in the intermediate state (i.e. Glauber elastic rescattering) at the highest energy by about a half an order of magnitude. Our updated analysis of the data on 16O (as well as new outgoing pion momentum spectra on 16O and 6,7Li at 0.59 GeV and some auxiliary measurements) confirms our evidence for this anomalous DCX energy behavior. Thus other mechanisms of DCX are needed to explain the observed energy dependence. The theoretical analysis showed that the Glauber inelastic rescatterings (IR) mediated by intermediate states of several (mainly two) pions appeared to give an important contribution to the inclusive DCX cross sec...
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