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Unitarity and current algebra constraints in a low-energy Kπ model

Унитарность и ограничения алгебры токов в Kπ модели при низких энергиях

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Il Nuovo Cimento A (1965-1970)

Summary

A crossing-symmetric model for low-energy πK scattering in investigated. The model satisfies elastic unitarity to a good approximation, on and off the mass shell. With some minimal additional input from current algebra,s-wave phase shifts andp-wave scattering lengths are determined. A comparison is made with further current algebra theorems including those arising from the (3*, 3)+(3, 3*) symmetry-breaking scheme.

Riassunto

Si indaga su un modello a simmetria incrociata per lo scattering πK di bassa energia. Il modello soddisfa con buona approssimazione le condizioni di unitarietà elastica all'interno e all'esterno dello strato della massa. Con qualche minima immissione aggiuntiva dall'algebra delle correnti, si determinano gli spostamenti di fase delle ondes e le distanze di scattering delle ondep. Si fa un confronto con ulteriori teoremi dell'algebra delle correnti, compresi quelli che derivano dallo schema di rottura della simmetria (3*, 3)+(3, 3*).

Резюме

Исследуется кроссинг-симметричная модель πK рассеяния при низких энергиях. Эта модель удовлетворяет упругой унитарности с хорошей степенью точности на и вне массовой поверхности. С помощью некоторых минимальных дополнительных исходных данных из алгебры токов, определяются фазовые сдвиги дляs волны и длины рассеяния дляp волны. Проводится сравнение с теоремами алгебры токов, включая теоремы, возникающие из схемы нарушения симметрии (3*, 3)+(3, 3*).

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Komen, G.J. Unitarity and current algebra constraints in a low-energy Kπ model. Nuov Cim A 19, 265–278 (1974). https://doi.org/10.1007/BF02801852

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  • DOI: https://doi.org/10.1007/BF02801852

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