Abstract
The total cross section and angular distributions for the differential cross section and the analyzing power of the exclusive two-body pion production reaction (p→,) have been measured at 147 MeV, very near the threshold energy of 145 MeV. Both the large forward-backward asymmetry in the angular distribution of the differential cross section and the large values observed for the analyzing powers indicate strong interference between the amplitude for s-wave pion emission and the amplitudes for p-wave pion emission. A phase-shift analysis performed on these new data yields significant p-wave strength at this low energy. The measurements for production from carbon are in agreement with results extracted from existing data for production from carbon, after corrections for isospin invariance and Coulomb effects. The reduced s-wave strength is found to have a simple power law dependence on the total number of nucleons in the final bound state.
- Received 2 August 1993
DOI:https://doi.org/10.1103/PhysRevC.48.2763
©1993 American Physical Society