Abstract
Correlations in relative (energy-weighted) distance between hadrons and electromagnetic particles are studied in the families observed in Chacaltaya emulsion chamber experiment. It is found that the observed number of hadrons which accompany electromagnetic in very close vicinity, say \({\lesssim} 1\) mm, is far larger than that in the background distribution. The chance probability to have such large number of shower-accompanied hadrons, expected from background calculation, is found to be negligibly small, \({\lesssim} 10^{-5}\), and it means there exists anomalous correlation between hadrons and electromagnetic particles in the characteristic spread of atmospheric electromagnetic cascade. The results are also compared with those of Japan-USSR joint chamber exposed at Pamir observatory.
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