A study of very high energy hadron interactions through observation of cosmic-ray families with visible energy not less than 500 TeV, 3

Details A study of very high energy hadron interactions through observation of cosmic-ray families with visible energy not less than 500 TeV, 3 A study of very high energy hadron interactions through observation of cosmic-ray families with visible energy not less than 500 TeV, 3

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993eme..work....9b&link_type=abstract

In Tokyo Univ., Contributions to the 23rd ICRC from Emulsion Chamber Experiments at Mt. Chacaltaya and Pamirs p 9-12 (SEE N94-25

Physics

Cosmic Ray Showers, Hadrons, High Altitude Environments, High Energy Interactions, Space Observations (From Earth), Charged Particles, Energy Distribution, Flux (Rate)

Scientific paper

This report presents the clean and/or quasi-clean examples which show characteristics of extremely large pt(gamma) particle production among 75 families of the highest energy range--those with visible energy sum greater than 500 TeV. It is possible to select clean and/or quasi-clean families by looking for the events which show an absent or very minor contribution of lower energy showers over the family area, since such lower energy showers near the threshold energy must come from secondary and/or tertiary effects during the passage through the atmosphere. Examples are given of such quasi-clean families with extreme large lateral spread and where the interaction must occur near the chambers. This indicates abnormal large pt particle production. The studies have been continuously made on the nature of high energy secondaries from 'Centauro-species' in Chacaltaya two-story chambers. Striking characteristics have been noticed on the nature of high energy secondaries from Chiron-type families. They are the existence of penetrating 'mini-clusters' of small pt(gamma) particle productions and the short collision mean free path of high energy secondaries in not only in atmosphere but also in the chamber material. The results of a systematic study on interaction mean free path of high energy secondaries from Chiron-type interactions by measuring the distribution of shower starting position in Chacaltaya two-story chambers are outlined.

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