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Prog. Theor. Phys. Vol. 55 No. 6 (1976) pp. 1896-1911

[ Full Text PDF : FREE ACCESS (1414K) ]

Can We Understand High Energy Cosmic-Ray Spectra on the Basis of the Scaling Hypothesis?

Katsuaki Kasahara and Yoshiyuki Takahashi*

Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo
*Faculty of Engineering Science, Osaka University, Osaka

(Received December 22, 1975)

Abstract:

Using the essential point of Feynman's hadronic scaling hypothesis, we have made a calculation of atmospheric cosmic-ray spectra, i.e., spectra of muons, hadrons and electromagnetic component. The results are compared with emulsion chamber data on the three components. In doing so, various factors related to the primary cosmic-ray spectrum are carefully examined. It is shown that the scaling feature of particle production in the entire energy region (up to several times 1016 eV) is compatible with the data only when one assumes i) very large inelastic cross-sections (∼ 380 mb for p-air collisions) and ii) the steepening of the (proton equivalent) primary cosmic-rays above several times 1014 eV, of which the intensity is much less than some air shower data.
Another feasible way of understanding the phenomena is discussed by hypothesizing a break of the scaling feature in the fragmentation region at high energies (\gtrsim 1014 eV).


URL : http://ptp.ipap.jp/link?PTP/55/1896/
DOI : 10.1143/PTP.55.1896

[ Full Text PDF : FREE ACCESS (1414K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 77 No. 6 (1987) pp. 1411-1433 :
    Behaviour of Cosmic Rays in the Atmosphere at Super High Energy Region
    Akinori Ohsawa and Seibun Yamashita
  2. Progress of Theoretical Physics Vol. 83 No. 1 (1990) pp. 58-76 :
    Nuclear Interactions in Super High Energy Region
    Jose Bellandi F., Sergio Q. Brunetto, Jose A. Chinellato, Carola Dobrigkeit, Akinori Ohsawa, Kotaro Sawayanagi and Edison H. Shibuya

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