References
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TheS-wave Born approximation is reduced by a factor ΔM/M (see ref. (6)) relative to the commutator term; it does not vanish is spite of charge-conjugation invariance (seeM. Suzuki, ref. (2)).
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This situation is to be compared to the Sugawara-Suzuki relations (ref. (2)), which (at least experimentally) cannot be distinguished from the ΔI = 1/2 rule.
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Research sponsored by the Air Force Office of Scientific Research, Office of Aerospace Research, United States Air Force, under AFOSR grant number EOOAR-68-0010, through the European Office of Aerospace Research.
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Gronau, M. CP-violation in nonleptonic hyperon decays in current-current models. Lettere Nuovo Cimento (1969-1970) 1, 209–213 (1969). https://doi.org/10.1007/BF02752482
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DOI: https://doi.org/10.1007/BF02752482