Skip to main content
Log in

Spectral index of primary cosmic rays. A QCD-admissible derivation

  • Published:
Il Nuovo Cimento C

Summary

Considering p-p collisions in terms of Drell-Yan and other related processes, where the interaction at the quark level is represented by a dimensionaless interaction potential, we derive an analytical formula for predicting the spectral index of primary cosmic rays. Adjusting a single free parameter of this formula, we find excellent agreement with experimental data over a wide energy range.

Riassunto

Considerando le collisioni p-p in termini del processo di Drell-Yan e di altri processi ad esse collegati, in cui l'interazione al livello dei quark è rappresentata da un potenziale d'interazione senza dimensioni, si deduce una formula analitica per prevedere l'indice spettrale dei raggi cosmici primari. Adattando un parametro libero singolo di questa formula si trova un eccellente accordo con i dati sperimentali su un ampio intervallo d'energia.

Резюме

Рассматривая p-p соударения в терминах процессов Дрелла-Яна и других связанных процессов, где взаимодействие на кварковом уровне представляется с помощью потенциала безразмерного взаимодействия, мы выводим аналитическое выражение для определения спектрального показателя первичных космических лучей. Подгоняя единственный свободный параметр в этой формуле, мы получаем хорошее согласие с экспериментальными данными в широкой области енергий.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. R. Blanford andD. Eichler:Phys. Rep. C,154, 1 (1988).

    Article  ADS  Google Scholar 

  2. A. Osawa:Prog. Theor. Phys. Suppl.,47, 180 (1971).

    Article  ADS  Google Scholar 

  3. J. Kogut andL. Susskind:Phys. Rev. D,9, 697 (1974).

    Article  ADS  Google Scholar 

  4. C. E. Fichtel andJ. Linsley:Astrophys. J.,300, 474 (1986).

    Article  ADS  Google Scholar 

  5. M. J. Ryan, V. K. Balasubrahmanyan andJ. F. Ormes:Phys. Rev. Lett.,28, 1497 (1972).

    Article  ADS  Google Scholar 

  6. M. Simon, H. Spiegelhauer, W. K. H. Schmidt, F. Siohan, J. Ormes, V. K. Balasubrahmanyan andJ. F. Arens:Astrophys. J.,239, 712 (1980).

    Article  ADS  Google Scholar 

  7. T. H. Burnett, S. Dake, M. Fuki, J. C. Gregory, T. Hayashi, R. Holynski, R. W. Huggett, S. D. Hunter, J. Iwai, W. V. Jones, A. Jurak, J. J. Lord, O. Miyamura, H. Oda, T. Ogata, T. A. Parnell, T. Saito, T. Tabuki, Y. Takahashi, T. Tominaga, J. W. Watts, B. Wilczynska R. J. Wilkes, W. Wolter andB. Wosiek:Phys. Rev. Lett.,51, 1010 (1983).

    Article  ADS  Google Scholar 

  8. Proceedings of the XVIII International Cosmic Rays Conference Papers, Vol.2 (1983), p. 105.

  9. N. L. Grigorov, N. A. Mamontova, I. D. Rapoport, I. A. Savenko, V. V. Akimov andV. E. Nesterov:Proceedings of the XII International Cosmic Rays Confrence Papers, Vol.5 (1971), p. 1746.

    Google Scholar 

  10. G. B. Khristiansen, A. Yu. Fomin, N. A. Aliev, T. A. Alimov, N. Kh. Khakimov, M. K. Kakhkharov, B. M. Machmudov, M. R. Rakhimova, andR. T. Tashpulatov:Proceedings of the XVIII International Cosmic Rays Conference Papers, Vol.9 (1983), p. 195.

    Google Scholar 

  11. N. M. Efimov andV. F. Sokurov:Proceedings of the XVIII International Cosmic Rays Conference Papers, Vol.2 (1983), p. 123.

    Google Scholar 

  12. M. Lapointe, K. Kamata, J. Gaebler, I. Escobar, V. Domingo, K. Suga, K. Murakami, Y. Toyodo andS. Shibata:Can. J. Phys,46, S 68 (1968).

    Article  Google Scholar 

  13. G. Cunningham, J. Lloyd-Evans, A. M. T. Pollock, R. J. O. Reid andA. A. Watson:Astrophys. J.,236, 71 (1980).

    Article  ADS  Google Scholar 

  14. A. J. Bower, G. Cunnigham, J. Linsley, R. J. O. Reid andA. A. Watson:J. Phys. G,9, L53 (1983).

    Article  ADS  Google Scholar 

  15. J. Nishimura:Handbuch der Physik, Vol.46, edited byG. Flugge (Springer-Verlag, Berlin, 1967), p. 1.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Sidhanta, J., Roychoudhury, R.K., Pal, P. et al. Spectral index of primary cosmic rays. A QCD-admissible derivation. Il Nuovo Cimento C 12, 31–39 (1989). https://doi.org/10.1007/BF02509069

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02509069

PACS 94.40

Navigation