Summary
A study has been made of the density of high-energy muons (10<E μ<300 GeV) as a function of the distance from the axis of extensive air showers in the size range 2·105<N e<3·106,i.e. showers produced by primary cosmic rays in a decade of energy centered on 5·1015 eV. The results for muons above 50 GeV agree with those from the Lodz-Moscow group, but those for muons above 200 GeV are a little different from the only other experimental results: those of Acharyaet al. Comparison with predictions favours a CKP-type model with a «normal» comparison. The simple scaling model with any composition does not give a good fit to the data, but no doubt modifications could be made, principally an increase in the mean transverse momentum, which would restore agreement.
Riassunto
Si è effettuato uno studio della densità dei muoni (10<E μ<300 GeV) in funzione della distanza dall’asse di sciami d’aria estesi nell’intervallo di grandezza 2·105<N e<<3·106, cioè sciami prodotti da raggi cosmici del primario in un decadimento di energia centrato su 5 · 1015 eV. I risultati per muoni al di sopra di 50 GeV sono in accordo con quelli del gruppo di Lodz-Moscow, ma quelle per muoni al di sopra di 200 GeV sono un po’ differenti dagli unici altri risultati sperimentali: quelli di Acharyaet al. Confronti con produzioni sono a favore del modello del tipo CKP con una composizione « normale ». Il modello a variazione di scala semplice con qualsiasi composizione non dà un buon adattamento ai dati, ma, senza dubbio, modificazioni potrebbero essere fatte, principalmente un aumento nell’impulso trasversale medio, che ripristinerebbero l’accordo.
Similar content being viewed by others
References
A. D. Erlykin, L. K. Ng andA. W. Wolfendale:J. Phys. A,8, L51 (1978).
C. A. Ayre andM. G. Thompson:Nucl. Instrum. Methods,69, 106 (1969).
C. A. Ayre: Ph. D. Thesis, University of Durham (1971).
M. G. Thompson andS. Wells:Nucl. Instrum. Methods,102, 35 (1972).
W. S. Rada: Thesis, University of Durham.
A. C. Smith andM. G. Thompson:Nucl. Instrum. Methods,145, 289 (1977).
C. A. Ayre andM. G. Thompson:Nucl. Instrum. Methods,69, 106 (1969).
S. M. Rozhdestvensky et al.:Proceedings of the International Conference on Cosmic Rays, Vol.8 (Munich, 1975), p. 2790.
R. C. Hawkes: Ph. D. Thesis, University of Durham (1977).
B. S. Acharya et al:Proceedings of the International Conference on Cosmic Rays, Vol.8 (Plovdiv, 1977), p. 35.
K. E. Turver:Survey of computer simulations of air showers, Internal Report, University of Durham (1974).
H. E. Dixon andK. E. Turver:Proc. R. Soc. London Ser A,339, 171 (1974).
G. Cocconi, L. J. Koester andD. H. Perkins: Lawrence Radiation Laboratory High-Energy Physics Studies Seminar, No. 28, 2 (1961).
J. Olejniczak: Ph. D. Thesis, University of Lods, Poland (1975).
P. K. F. Greider:Proceedings of the International Conference on Cosmic Rays, Vol.8 (Munich, 1975), p. 2889.
P. K. F. Greider:Nuovo Cimento,7, 1 (1977).
R. P. Feynman:Phys. Rev. Lett.,23, 1415 (1969).
A. Goned:Nuovo Cimento A,29, 301 (1975).
J. Wdowczyk andA. N. Wolfendale: private communication.
Author information
Authors and Affiliations
Additional information
To speed up publication, the authors of this paper have agreed to not receive the proofs for correction.
Rights and permissions
About this article
Cite this article
Rada, W.S., Smith, A.C., Stewart, T.R. et al. High-energy muons in extensive air showers. Nuov Cim A 54, 208–216 (1979). https://doi.org/10.1007/BF02899788
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02899788