Single pion production in neutrino reactions and estimates for charge-exchange effects

We calculate single pion production by neutrinos in the resonance region. W e consider both charged and neutral current reactions on free protons and n eutrons. We present differential and total cross sections which can be comp ared with experiments. Then we use these results to calculate the spectra o f the emerging pions including the Pauli suppression factor and rescatterin g corrections for reactions in heavy nuclei. Our results will be useful for studying single pion production and for investigating neutrino oscillation s in future experiments. (C) 2000 Elsevier Science B.V. All rights reserved .