1. チャカルタヤ山宇宙線共同実験
玉田雅宣　（近畿大学）
本田　建　（山梨大学）
他Ｃｈａｃａｌｔａｙａ　Ｃｏｌｌａｂｏｒａｔｏｒ

2. Collaborator
M.Tamada5 ,K.Honda1,N.Ohmori3,K.Shinozaki4,N.Inoue4,N.Kawasumi2,N.Ochi,
K.Hashimoto2,I.Tsushima2,A.Ohsawa6,H.Aoki7,K.Yokoi8,T.Matano9,
N.Martinic10,R.Ticona10,C.Aguirre10
[1]Faculty of Engineering, Yamanashi University, Kofu, , Japan [2]Faculty of Education, Yamanashi University, Kofu, , Japan [3]Faculty of Science, Kochi University, , Japan [4]Faculty of Science, Saitama University, , Japan [5]Faculty of Science and Technology, Kinki University, , Japan [6]Institute for Cosmic Ray Research, University Tokyo, , Japan [7]Faculty of Science, Souka University, , Japan [8]College of science and Engineering, Aoyama Gakuin University, , Japan [9]Shibakubo-cho ,Tanashi, Japan [10]Institute de Investigaciones Fisicas Universidad Mayor de San Andres, Bolivia

3. ? ?

4. atmospheric family
Eg, Rg
Eh(g), Rh
atmospheric family (A-jets)

5. Family intensity QGSJET with EAS sp. gives 3~4 times larger intensity.
†proton dominant model
[ p(42%),He(17%),CNO(14%),heavy(14%),Fe(13%) at E0=1015eV]
†all particles spectrum = EAS data (Tibet, Akeno)
QGSJET with EAS sp. gives 3~4 times larger intensity.
Violent energy dissipation !?

6. QGSJET with RUNJOB sp. describes well.
†proton dominant model
[ p(42%),He(17%),CNO(14%),heavy(14%),Fe(13%) at E0=1015eV]
†all particles spectrum = RUNJOB data
QGSJET with RUNJOB sp. describes well.

7. Air-shower array + Emulsion chamber
Hybrid experiment
Air-shower array + Emulsion chamber

8. Chacaltaya hybrid experiment (Chacaltaya,5200m)
Hadron Calorimeter
EAS-array

9. hadron component in EAS
KASCADE
T.Antoni et al. J.Phys.G27(2001) 1785,
CERN COURIER 42-6(2002)
Chacaltaya ESarray+EM ; A.Aguirre et al. PRD62(2000)032003
Models fail to describe hadron number in EAS.
strong violation of Feynman scaling law !?

10. HADRON-M (Tien-Shan, 3340m)
Emulsion chamber
EAS-array

11. Tibet ASg (Yangbajing, 4300m)
AS-array
Tibet ASg (Yangbajing, 4300m)
Emulsion chamber
Burst detector

12. EAS triggered family violent energy dissipation
Strong violation of Feynman scaling law at E0≥1016eV !?

13. statistical fluctuation ??
Discrepancy is due to
statistical fluctuation ??
All particles : Tibet > RUNJOB
Protons, He : Tibet ~ RUNJOB
Heavy : Tibet > RUNJOB
Tibet data
Tibet : PRD62(2000)112002
Proc. ICRC2001,148
Fe(Tibet HD-model)
Proton(Tibet HD-model)
RUNJOB: Astrop. Phys.16(2001) 13

14. Cosmic-ray nuclear interaction at E0=1015~1017eV is still far from full understanding.
Changes of primary composition alone solve the discrepancies between experimental data and model prediction (Tibet group) ??
There seems no possibility.
Changes of nuclear interaction are necessary.
Severe energy dissipation etc.
(Strong vilation of Feynman Scaling law)
Role of exotics ?

15. Tevatron SppS LHC E0 (eV) 1013 1014 1019 1018 1017 1016 1015 1020 ?
emulsion chamber
+ Air Shower array
emulsion chamber
Air Shower array
C-jets
families
‘halo’
families with EAS data
EAS
beyond GKZ
unexplained (exotic) events
mild violation of
Feynman scaling law
strong violation of
Feynman scaling law ?
QGSJET
OK !! ?
QGSJET
OK ???

16. future prospect
ATHLET

17. measurement of emulsion chamber data is very time consuming
semi-automatic measurement using image-scanner ;
successful in Tibet group,
(Nucl. Instr. Meth. A523(2004) 193)
in progress in Chacaltaya group & Pamir group