Abstract
The Ericson-Ericson optical potential for theπ-nucleuss-wave interaction was extended to be applicable also for light nuclei. In particular, terms of order A−1 were evaluated and the (π2N) dispersion was considered. From comparison with experimental data we found that considerable improvement could be achieved by introducing terms of order A−1. The (π2N) dispersion was found to be repulsive and of the same magnitude as the absorption. The (πN) scattering lengths were deduced to be α3−α1=0.258±0.008m −1π and α1+2α3=−0.018±0.008m −1π .
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One of us (W. S.) thanks the CERN NP Division and the group of Professor G. Backenstoss for the hospitality extended to him during his stay at CERN. This work was partly supported by the German Bundesministerium für Forschung und Technologie.
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Tauscher, L., Schneider, W. Optical potential calculations for the 1s level in pionic atoms. Z. Physik 271, 409–415 (1974). https://doi.org/10.1007/BF02126196
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DOI: https://doi.org/10.1007/BF02126196