Abstract
Spectator nucleon distributions in¯pd →mπN are directly related to the antiproton-nucleon annihilation process below threshold. To demonstrate this quantitatively, we analyse the available¯pd → 3πN and¯pd → 5πN data. For these data, (and others) the shape of the annihilation spectrum in the peak region is well described by the tree diagram, and reflects mainly theS-state part of the deuteron wave function. The data are not consistent with a strong structure in the antinucleon-nucleon sub-thresh-old amplitude as reported in the dispersion analysis of¯pp while a weak structure is consistent with the existing data.
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Fasano, C.G., Locher, M.P. Evidence against a strong sub-threshold structure in the¯p p amplitude. Z. Physik A - Atomic Nuclei 336, 469–471 (1990). https://doi.org/10.1007/BF01294120
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DOI: https://doi.org/10.1007/BF01294120