Pseudoscalar Coupling and S-Wave Pion-Nucleon and Kaon-Nucleon Scattering
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概要
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The pion-nucleon s-wave scattering is investigated in the case of the Yukawa interaction of pseudoscalar coupling, making use of the Chew-Low formalism. It is shown that the s-wave amplitude of the π-N scattering is strongly damped compared with the perturbation theoretic caluculation. This is due to the fact that the second order matrix elements are almost cancelled by some of the fourth order ones which appear in the reduced Chew-Low equation as modified Born terms. The photo-pion production near the threshold energy is also discussed on the same footing. In this case, this sort of cancellation does not occur and the amplitudes for this process remain unchanged. We calculate the charge ratio of photo-pion productions at the threshold energy and get a value 2.27 which is larger than the experimental one 1.87±0.13. In addition the low energy kaon-nucleon and the pion-hyperon scattering are treated in a similar manner.
- 理論物理学刊行会の論文
- 1959-09-25
著者
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Sugano Reiji
Department Of Physics Kyoto University
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SUGANO Reiji
Department of Physics, Kyoto University
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