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We wish to emphasize again that « attraction » and « repulsion » in our terminology imply nothing further than that the real part of the forward scattering amplitude is positive (or negative), corresponding to constructive (or destructive) Coulomb-nuclear interference. The question whether a « repulsive » interaction is true repulsion or strong attraction can be decided only by higher energy behaviour. See in this connection,Karplus et al. [Phys. Rev. Lett.,2, 510 (1959)].
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I would like to thank Dr.R. C. Hwa for an interesting discussion. A detailed study by Dr.Hwa is in progress.
Preliminary data suggest thatJ=3/2 is somewhat more likely (private communication from Prof.H. K. Ticho). In view of its importance to theoretical understanding, we would like to encourage a very accurate determination for this spin.
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This work was supported by the U. S. Atomic Energy Commission.
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Tuan, S.F. The excited hyperon and pion-hyperon resonances. Nuovo Cim 18, 1301–1304 (1960). https://doi.org/10.1007/BF02733195
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DOI: https://doi.org/10.1007/BF02733195