Summary
A Regge-cut model which incorporates the Veneziano amplitude extrapolated to off the mass shell in the reggeon-diagram technique is proposed. The cut satisfies Mandelstam’s criteria on cutgenerating diagrams, and the discontinuity across Regge cuts is parametrized by relatively few free parameters. Qualitative predictions about some high-energy reactions are derived from the assumption of nonexotic resonances and the dominance of leading poles in the Veneziano amplitudes.
Riassunto
Si propone un modello di tagli di Regge che incorpora l’ampiezza di Veneziano estrapolata fuori dello strato delle masse nella tecnica del diagramma dei reggeoni. Il taglio soddisfa i criteri di Mandelstam sui diagrammi generatori di tagli, e la discontinuità attraverso i tagli di Regge è parametrizzata con un numero relativamente piccolo di parametri. Dall’ipotesi che non vi siano risonanze esotiche e dalla predominanza dei poli principali nelle ampiezze di Veneziano si traggono predizioni su alcune reazioni di alta energia.
Реэюме
Предлагается модель раэреэа Редже, которая испольэует амплитуду Венециано, зкстраполированную вне массовой поверхности в технике реджеонных диаграмм. Этот раэреэ удовлетворяет критерию Манделстама на диаграммах, обраэуюших раэреэ. Скачок на раэреэах Редже параметриэуется с помошью нескольких свободных параметров. Выводятся качественные предскаэания относительно некоторых реакций при высоких знергиях, исходя иэ предположения об отсутствии зкэотических реэонансов и доминантности главных полюсов в амплитудах Венециано.
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References
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Kobayashi, T., Yamagishi, K. A phenomenological model of Regge cuts based on the reggeon-diagram technique. Qualitative considerations. Nuov Cim A 6, 232–240 (1971). https://doi.org/10.1007/BF02728597
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DOI: https://doi.org/10.1007/BF02728597