Abstract
MultichannelM-matrix method is applied to an N¯N-system with taking into account elasticp¯ p-scattering, charge-exchangep¯ p → n¯ n reaction andp¯ p annihilation. The isospin breaking in theM-matrix is discussed. We describe the differential and total cross-sections forp¯ p → p¯ p andp¯ p → n¯ n processes, cross-section σtot(p¯ p) and the real-to-imaginary ratio of the forward amplitude of elasticp¯ p scattering. The fitting leads to bound state in thep-wave near thep¯ p-threshold, which elucidates a significant role of this wave at small energies.
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We are very indebted to T.-A. Shibata and B.O. Kerbikov for the experimental information and to M.V. Henner for the help in calculations.
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Henner, V.K., Meshcheryakov, V.A. Multichannel effective range approach to low energy nucleon-antinucleon interactions. Z. Physik A - Hadrons and Nuclei 345, 215–221 (1993). https://doi.org/10.1007/BF01293347
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DOI: https://doi.org/10.1007/BF01293347