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Il Nuovo Cimento

, Volume 9, Issue 5, pp 961–983 | Cite as

Simple leaky box model for cosmic-ray propagation, models for production of antiprotons at ultrahigh energies and the estimations of the \(\bar p/p\) ratiosratios

  • S. Bhattacharyya
  • Pratibha Pal
Article
  • 271 Downloads

Summary

Accepting the simple leaky box model as the basis for propagation of cosmic rays, the problematical \(\bar p/p\) ratio has been estimated theoretically by applying two versions of antiproton production models. The results have been compared with those from the experiments as well as from some other empirio-theoretical models. It has been emphatically pointed out that even within the premises of the simple leaky box model the discrepancies can be removed only by taking into account the contributions from the large-p T antiproton production cross-sections and the role of theA-dependence of nuclear cross-sections in a much more pronounced way.

Keyword

PACS. 94.40 Cosmic rays 

Простая модель распространения космических лучей, модели образования антипротонов при ультравысоких Энергиях и оценки \(\bar p/p\) отнощенийотнощений

Резюме

Ha основе простой модели распространения космических лучей теоретически оценивается \(\bar p/p\) отнощение, используя две модели образования антипротонов. Полученные результаты сравниваются с результатами Экспериментов, а также с результатами других Эмпирико-теоретич еских моделей. Отмечается, что, используя только предположения простой модели, можно устранить расхождения, если учесть вклады поперечных сечений образования антипротонов с больщимир T и более явно зависимость от А ядерных поперечных сечений.

Riassunto

Accettando il modello semplice della scatola non isolata, è stato stimato il rapporto critico \(\bar p/p\) teoricamente applicando due versioni dei modelli di produzione degli antiprotoni. Sono stati confrontati i risultati con quelli degli esperimenti ed anche con quelli di altri modelli empirico-teorici. È stato evidenziato che anche nell’ambito delle premesse del modello semplice della scatola non isolata si possono eliminare le discrepanze tenendo maggiormente conto dei contributi delle sezioni d’urto di produzione di antiprotoni a grandep T e del ruolo della dipendenza daA delle sezioni d’urto nucleare in modo molto più marcato.

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Copyright information

© Societá Italiana di Fisica 1986

Authors and Affiliations

  • S. Bhattacharyya
    • 1
  • Pratibha Pal
    • 2
  1. 1.Physical and Earth Science DivisionIndian Statistical InstituteCalcuttaIndia
  2. 2.Department of Theoretical Physics, Cosmic Rays Physics GroupIndian Association for the Coltivation of ScienceCalcuttaIndia

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