Pauli principle and pion distortion in the p-wave pionic double charge exchange reaction

摘要

We propose an approach which takes the Pauli principle and pion distortion into account to investigate the p-wave absorption/emission mechanism of the double charge exchange reaction. The ground state to ground-state processes Te-128(pi(+),pi(-))Xe-128 and Te-130(pi(+), pi(-))Xe-130 are discussed in the new approach. Excitation functions with a maximum energy distribution at T-pi approximate to 50 MeV have been obtained. The calculated differential cross sections at theta(Lab.) = 30 degrees with T-pi approximate to 50 MeV and their ratio agree well with experimental data and depend only slightly on the particle-particle interaction parameter g(pp) Results indicate that the Pauli principle lowers the cross section and stabilizes its dependence on g(pp) evidently while pion distortion reduces the cross section in the energy region above the resonance. [References: 66]