Summary
The phenomenological model of Chanet al. is generalized to include the formation of resonances between particles of low invariant mass. As well as removing an inconsistency of the model, resonance production successfully accounts for the pronounced backward peak in baryon longitudinal-momentum distributions. The improved model has been applied to the reactions π+p→p+(n−1)π at 8 GeV and K−p→Λ+(n−1)π at 6 GeV withn varying from 3 to 6. Good qualitative agreement with the experimental two-particle effective mass distributions is obtained.
Riassunto
Si generalizza il modello fenomenologico di Chanet al. fino ad includere la formazione di risonanze fra particelle con massa invariante bassa. Oltre ad eliminare un’incongruenza del modello, la produzione di risonanze rende conto con successo del notevole picco all’indietro nelle distribuzioni delle quantità di moto longitudinale dei barioni. Si è applicato il modello migliorato alle reazioni π+p→p+(n−1)π a 8 GeV e K−p→Λ+(n−1)π a 6 GeV conn variabile da 3 a 6. Si ottiene un buon accordo qualitativo con le distribuzioni sperimentali delle masse effettive di biparticelle.
Резюме
Феноменологическая модель Чена и др. обобщается, чтобы включить образование резонансов между частицами с малой инвариантной массой. Как устранение непоследовательности модели, рождение резонансов также успешно учитывает обнаруженный пик в направлении назад в барионных распределениях продольного импульса. Улучшенная модель применяется к реакциям π+p→p+(n−1)π при 8 ГэВ и K−p→Λ+(n−1)π при 6 ГэВ сn, изменяющимся от 3 до 6. Получается хорошее качественное согласие с экспериментальными двух-частичными распределениями эффективной масы.
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Plahte, E., Roberts, R.G. A method for including resonance production in a Reggeized multiperipheral model. Nuovo Cimento A (1965-1970) 60, 33–46 (1969). https://doi.org/10.1007/BF02823295
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DOI: https://doi.org/10.1007/BF02823295