Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya

Details Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvd..53.3534k&link_type=abstract

Physical Review D (Particles and Fields), Volume 53, Issue 7, 1 April 1996, pp.3534-3546

Physics

14

Inelastic Scattering: Many-Particle Final States, Cosmic-Ray Interactions

Scientific paper

Simultaneous observations of families and accompanied air showers with emulsion chambers and the air shower array of electronic equipment at Mt. Chacaltaya (5200 m, 540 g/cm2) reveal that families bear the data of nuclear interactions generated deep in the atmosphere. 47 outstanding families with ΣEγ>=10 TeV are correlated with the accompanied air showers of the size 105-108. A scatter plot of the average family energy versus the size of the relative air shower requires further energy fractionizing process(es) in the propagation of high energy cosmic rays in the atmosphere, such as a larger dissipative mechanism in nuclear interaction, heavier chemical composition of the primary cosmic rays, etc. We reach the conclusion that nuclear interaction changes its features in the energy region E0>~1016 eV, because the heavier composition, proposed so far, is not sufficient for the required dissipative process. A comparison with the data from the HADRON experiment at a similar altitude with a similar technique shows that no larger deviations are present between both experiments.

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