Air-showers, bursts and high energy families detected by hybrid experiments atMt.Chacaltaya

H. Aoki, K. Honda, N. Inoue, N. Kawasumi, N. Martinic, N. Ochi, N. Ohmori, A. Ohsawa, M. Tamada, Rolando Ticona Peralta, T. Yamasaki

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations


The hybrid experiment on Mt.Chacaltaya gives informations on various component in the air-showers. We have shown, from the analysis of the hybrid data, that the current interaction models can not describe well the characteristics of air-shower-triggered families by studying a correlation between air-shower size and accompanied family energies. In this paper we study in detail further correlations between air-shower size and burst-size, and those between burst-size and family energy in addition to those between air-shower size and family energy. Air-showers are calculated using CORSIKA simulation code with interaction models of QGSJET and EPOS, and burst-size of the events are calculated based on the simulations using GEANT4 code, taking into consideration the exact structure of the experimental hadron calorimeter. Comparison of the burst-size dependence of the family energy shows that the observed family energy accompanied by the air-showers with larger burst-size is systematically smaller than that expected in the simulated events. The experimental results can not be described simply by changing chemical composition of primary cosmic-rays and this indicates a necessity of some changes in the interaction model.

Original languageEnglish
Number of pages4
StatePublished - 2011
Event32nd International Cosmic Ray Conference, ICRC 2011 - Beijing, China
Duration: 11 Aug 201118 Aug 2011


Conference32nd International Cosmic Ray Conference, ICRC 2011


  • Air-shower
  • Burst
  • High-energy gamma family
  • Mountain experiment


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