Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya. II. Study of the hadronic component in air showers - art. no. 032003

Authors
Aguirre, C Aoki, H Hashimoto, K Honda, K Inoue, N Kawasumi, N Maeda, Y Martinic, N Matano, T Ohmori, N Ohsawa, A Shinozaki, K Tamada, M Ticona, R Tsushima, I
Citation
C. Aguirre et al., Simultaneous observation of families and accompanied air showers at Mt. Chacaltaya. II. Study of the hadronic component in air showers - art. no. 032003, PHYS REV D, 6203(3), 2000, pp. 2003
Citations number
33
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6203
Issue
3
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000801)6203:3<2003:SOOFAA>2.0.ZU;2-2
Abstract
An experimental setup of an air shower array, hadron calorimeter, and emuls ion chamber is being carried out at Mt. Chacaltaya (5200 m, Bolivia), in or der to study the hadron interaction and the primary cosmic rays in the ener gy region exceeding 10(15) eV. The number of hadrons in the air shower, det ected by the hadron calorimeter, is discussed mainly in this paper. A compa rison with the simulation shows that the number of hadrons in the air showe r is not compatible with that of the simulation, indicating that the Feynma n scaling law is violated more strongly than the one assumed in the simulat ion at 10(16 e)V. The average mass number of the primary cosmic rays, estim ated from the distribution of the number of hadrons, is (ln A) = 2.8 +/- 0. 5 at 10(16) eV.