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Phys. Rev. D 61, 012003 (1999) [10 pages]

Inelasticity distribution of hadron-Pb collisions in the energy region exceeding 1014 eV from mountain cosmic ray experiments

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C. R. A. Augusto1, S. L. C. Barroso2, Y. Fujimoto3, V. Kopenkin1,4, M. Moriya3, C. E. Navia1, A. Ohsawa5, E. H. Shibuya2, and M. Tamada6
1Instituto de Física, Universidade Federal Fluminense, 24020-130 Niteroi, Rio de Janeiro, Brazil
2Instituto de Física Gleb Wataghin, UNICAMP, 13083-970 Campinas, São Paulo, Brazil
3Advanced Research Center for Science and Engineering, Waseda University, Tokyo, 169 Japan
4Institute of Nuclear Physics, Moscow State University, 119899, Moscow, Russia
5Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo, 188 Japan
6Faculty of Science and Technology, Kinki University, Higashi-Osaka, Osaka, 577 Japan

Received 31 December 1998; published 8 December 1999

The inelasticity distribution of hadron-lead collisions in the energy region exceeding 1014 eV is estimated on the basis of 66 events, induced by cosmic ray hadrons and detected at high mountain altitudes at Pamir (4300 m, 595 g/cm2). The distribution of the best fitting is approximated as g(K)dK=[α(1-K)m1-1+βKm2-1]dK, where m1=0.5, m2=1.125, α=0.26, β=0.55, giving 〈K〉=0.60. The errors of the parameters are discussed in the text. The distribution is compared with those which are based on theoretical models.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.61.012003
DOI:
10.1103/PhysRevD.61.012003
PACS:
96.40.De, 13.85.Tp
 
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