山宇宙线共同実験

1、山宇宙線共同実験玉田雅宣（近畿大学）本田建（山梨大学）他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.Aguirre101Faculty of Engineering, Yamanashi University, Kofu, 400-8511, Japan2Faculty of Education, Yamanashi Uni

2、versity, Kofu,400-8510, Japan3Faculty of Science, Kochi University, 780-8520, Japan4Faculty of Science, Saitama University, 388-8570, Japan5Faculty of Science and Technology, Kinki University, 577-8520, Japan6Institute for Cosmic Ray Research, University Tokyo, 277-8582, Japan7Faculty of Science, So

3、uka University, 192-8577, Japan8College of science and Engineering, Aoyama Gakuin University, 157-8572, Japan9Shibakubo-cho 3-28-10,Tanashi,188-0014 Japan10Institute de Investigaciones Fisicas Universidad Mayor de San Andres, BoliviaCollaborator?atmospheric family (A-jets)Eg g, Rg gEh(g g), Rhemulsi

4、on chamberFamily intensityproton dominant model p(42%),He(17%),CNO(14%),heavy(14%),Fe(13%) at E0=1015eVall particles spectrum = EAS data (Tibet, Akeno)QGSJET with EAS sp. gives 34 times larger intensity. Violent energy dissipation !?proton dominant model p(42%),He(17%),CNO(14%),heavy(14%),Fe(13%) at

5、 E0=1015eVall particles spectrum = RUNJOB dataQGSJET with RUNJOB sp. describes well.EAS-arrayHadron Calorimeter(Chacaltaya,5200m)10m8m2KASCADET.Antoni et al. J.Phys.G27(2001) 1785,CERN COURIER 42-6(2002)Chacaltaya ESarray+EM ; A.Aguirre et al. PRD62(2000)032003Models fail to describe hadron number i

6、n EAS.strong violation of Feynman scaling law !?Emulsion chamberEAS-array(Tien-Shan, 3340m)10mAS-arrayBurst detectorEmulsion chamber(Yangbajing, 4300m)violent energy dissipationStrong violation of Feynman scaling law at E01016eV !?Fe(Tibet HD-model)Proton(Tibet HD-model)All particles : Tibet RUNJOBP

7、rotons, He : Tibet RUNJOBHeavy : Tibet RUNJOBDiscrepancy is due to statistical fluctuation ?Tibet : PRD62(2000)112002 Proc. ICRC2001,148RUNJOB: Astrop. Phys.16(2001) 13Tibet datalChanges of primary composition alone solve the discrepancies between experimental data and model prediction (Tibet group)

8、 ?There seems no possibility.Cosmic-ray nuclear interaction at E0=10151017eV is still far from full understanding.lChanges of nuclear interaction are necessary.Severe energy dissipation etc.(Strong vilation of Feynman Scaling law)lRole of exotics ?10131014101910181017101610151020SppSTevatronLHCC-jet

9、sfamiliesEAS beyond GKZhalofamilies with EAS dataQGSJETOK !QGSJETOK ?mild violation ofFeynman scaling lawstrong violation of Feynman scaling law ?unexplained (exotic) eventsE0 (eV)emulsion chamber + Air Shower arrayemulsion chamberAir Shower array?ATHLETmeasurement of emulsion chamber data is very time consumingsemi-automatic mea