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Topological expansion for baryons and mesons

Топологическое разложение для барионов и мезонов

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Il Nuovo Cimento A (1965-1970)

Summary

A method of including baryons in the topological classification scheme of Veneziano is described. Every amplitude is classified in terms of the number of handles and boundaries of an associated surface. This classification is purely topological. It does not refer to numbers of flavorsN, or rely on an equalityN −1∼-g 2 that is supposed to be a consequence of the topological expansion. The lowest-order amplitudes are associated with surfaces that have a characteristic tree structure. The analog of Veneziano’s planar-discontinuity formula holds.

Riassunto

Si descrive un metodo per includere i barioni nello schema topologico di classificazione di Veneziano. Ogni ampiezza è classificata in termini del numero di anse e di bordi di una superficie associata. Questa classificazione è puramente topologica. Non si riferisce a numeri di saporiN e non dipende da un’uguaglianzaN −1∼-g 2 che è considerata una conseguenza dello sviluppo topologico. Le ampiezze di ordine inferiore sono associate a superfici che hanno caratteristiche strutture ad albero. È valido l’analogo della formula della discontinuità planare di Veneziano.

Резюме

Описывается метод, включающий барионы в топологическую классификационную схему Венециано. Указанная классификация является чисто топологической. При классификации не упоминается число флаворовN и не использчется равенствоN −1∼-g 2, т.е. классификация является следствием топологического разложения. Амплитуды низшего порядка связаны с поверхностями, которые имеют характеристическую древовидную структуру. Отмечается, что аналог формулы Венециано для плоского разрыва является справедливым.

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References

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This work is supported by the U.S. Energy Research and Development Administration, under the auspices of the Division of Physical Research.

Traduzione a cura della Redazione.

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Stapp, H.P. Topological expansion for baryons and mesons. Nuov Cim A 46, 37–60 (1978). https://doi.org/10.1007/BF02799578

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  • DOI: https://doi.org/10.1007/BF02799578

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