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Alignment in Gamma-Hadron Families Detected by Deep Lead X-Ray Emulsion Chambers

I. P. Ivanenko, V. V. Kopenkin, A. K. Managadze, I. V. Rakobolskaya

hep-pharXiv:hep-ph/9308218

Abstract

Alignment of main fluxes of energy in a target plane is found in families of cosmic ray particles detected in deep lead X-ray emulsion chambers. The fraction of aligned events becomes unexpectedly large for superfamilies with the total energy of gamma-quanta exceeding 103 TeV. This can be considered as an evidence of existence of coplanar scattering of secondary particles in interactions of primary particles with superhigh energies (E0 1016 eV). Data analysis suggests that production of most superfamilies happens low above the chamber and is characterized by a coplanar scattering and quasiscaling spectrum of secondary particles in the fragmentation region.

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