Models of Heavy Particle with Long Life in Cosmic Rays above 1015 eV

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Abstract
Models are proposed for the heavy particles with long life which are introduced in explaining experimental data on the delayed showers in the extensive air shower with the primary energy above 1015eV. By assuming these particles to be leptons possible models are discussed. The leptons are taken as decay products of hadrons that are produced by a strong interaction of the primary reaction. It is shown that the existence of heavy leptons and their parent particles gives reasonable solutions to the conspicuous changes reported in cosmic ray experiments above 1015eV.