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Good and bad operators in current algebra sum rules

Хорощие и плохие операторы в правилах сумм алгебры токов

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Il Nuovo Cimento A (1965-1970)

Summary

An ambiguity in current algebra sum rules is traced to the use of one good and one bad operator, but will exist even in the absence ofZ-graphs. It is shown that from the work of Gilman and Harari, the dynamical assumptions which ensure the convergence of the dispersion integrals, resolve the ambiguity.

Riassunto

Si fa risalire un'ambiguità nelle regole di somma dell'algebra delle correnti all'uso di un operatore buono ed uno cattivo; ma essa persiste anche in assenza di diagrammiZ. Si dimostra in base ad un lavoro di Gilman e Harari che le ipotesi dinamiche, che assicurano la convergenza degli integrali di dispersione, risolvono l'ambiguità.

Резюме

Неоднозначность в правилах сумм алгебры токов восходит к использованию одного хорощего и одного плохого операторов, но останется даже при отсутствииZ-графиков. Показывается, что из работы Гильмана и Харари динамические предположения, которые обеспечивают сходимость дисперсионных интегралов, разрещают эту неоднозначность.

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Literatur

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Postal address: Institute for Theoretical Physics, Arenberg Park, Heverlee.

Traduzione a cura della Redazione.

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Stern, H., Meuldermans, R. Good and bad operators in current algebra sum rules. Nuovo Cimento A (1965-1970) 64, 7–12 (1969). https://doi.org/10.1007/BF02824559

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