1. International Collaboration at KEK
M. Kobayashi

2. KEK：High Energy Accelerator Research Organization
Legal status: Inter-University Research Institute Corporation
Institute of Particle and Nuclear Studies
Institute of Materials Structure Science

3. Inter-University Research Institute Corporation
National Institutes for the Humanities (NIHU)
National Institutes of Natural Sciences (NINS)
Research Organization of Information and Systems (ROIS)
High Energy Accelerator Research Organization (KEK)
Users: “university teachers and others who engage
in the same research as the corporation conducts”

4. ICFA Guidelines

5. IUPAP Recommendations for the Use of Major Physics Users Facilities
22nd General Assembly of IUPAP (1996)

6. Top quark discovery at Tevatron Quark-gluon Plasma at RHIC
Japan-US Collaboration
Since 1979 M\
1989
1990
1991
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
Top quark discovery at Tevatron
Quark-gluon Plasma at RHIC
Observation of K+p+nn at AGS
FERMI Gamma ray observatory
CP studies at FNAL
Development of innovative
accelerators and detectors

7. Collaborations between DESY and Japanese institutes
on high energy physics
Initiated by professor Masatoshi Koshiba since 1973,
DASP is the first large-scale Europe-Japan
collaboration in high energy physics (yet O(10) physicists).
JADE at PETRA
ZEUS at HERA 1992-
DASP at DORIS
ZEUS is a collaboration with ~400 physicists (at peak)
with Asian institutes from Japan, Korea, Malaysia,
studying the proton structure with high energy ep collisions.

8. CERN-Japan Collaboration
Large Hadron Collider
(LHC)
Contribution from Japan
13.85 B\ (~ 135 M US$)
+ 3 B\ for detector (ATLAS)
ATLAS
The data taking started in Nov 2009.

9. Major Facilities of KEK
B-factory (Main campus)
asymmetric electron-positron collider
J-PARC (Tokai campus)
accelerator complex with 3 GeV and 50 GeV PS
Photon Factory (Main campus)
2.5 GeV Photon Factory storage ring
6.5 GeV PF-AR

10. J-PARC JAEA (Japan Atomic Energy Agency) Completed in 2009
Joint project with
JAEA (Japan Atomic Energy Agency)
Completed in 2009
proton
target
nucleus
pion
muon
neutrino
kaon
anti-proton
neutron

11. T2K experiment
The first neutrino is detected at Super-K

12. Photon Factory (Light Source)

13. B-Factory

14. Physics of B-factory
1971　‘t Hooft : Renormalization of Non-Abelian gauge theory
Renormalizable Electro-Weak Theory
(Weinberg-Salam-Glashow )
1973 Kobayashi, Maskawa
How to accommodate CP violation
What we found
Not possible with three or four quarks
Existence of unknown particles
A possible candidate is six-quark model

15. Standard Model Development of Experiments
1974 Discovery of J/y particle c-quark
ne nm nt　
e m t
1975 Discovery of t-lepton
1977 Discovery of U particle b-quark
1995 Discovery of t-quark
Theory of Strong Interactions
1973 QCD Asymptotic freedom
Quark confinement
Standard Model

16. u d s c t b ne nm e m nτ τ The Standard Model Fundamental particles
quarks
ne nm
e m nτ τ
leptons
Fundamental interactions
Electromagnetic
Weak
Strong
Weinberg-Salam-Glashow Theory
QCD

17. CP violation experiments at B-factories
B-factories at KEK and SLAC
collider
optimized for B-meson production
asymmetric energy
B meson

19. KEKB/Belle (Japan) PEP-II/BaBar (US)
E(e-)=8GeV,
E(e+)=3.5GeV
Finite angle beam crossing
Feature
E(e-)=9GeV,
E(e+)=3.1GeV
Zero angle beam crossing
Governmental Approval
Experiment
1994
1993
May 1999 –
still running
May 1999 –
Apr. 2008
Friendly competition of two experiments over a decade
Lpeak = 1.7×1034/cm2/s
Lpeak = 1.2×1034/cm2/s

20. 15 countries, 62 institutes, about 400 researchers
Belle:
15 countries, 62 institutes, about 400 researchers

21. Belle Members
15 Countries and Regions
62 Institution
409 Members

22. ACC (Aerogel Cherenkov counter)
KLM (m / KL detection)
14/15 lyr. RPC+Fe
CDC (drift chamber)
Tracking + dE/dx
small cell + He/C2H5
ECL
CsI(Tl) 16X0
ACC (Aerogel Cherenkov counter)
TOF (plastic scintillator bars)
SVD (Si vtx. det. 3 lyr. DSSD)
SC solenoid
1.5T
8GeV e-
3.5GeV e+

23. Belle, July 05
B0J/yKS
B0J/yKS

24. CKMfitter Group (J. Charles et al. ), Eur. Phys. J
CKMfitter Group (J. Charles et al.), Eur. Phys. J. C41, (2005) [hep-ph/ ], updated results and plots available at:

25. Number of Issued Papers
Number of Physics Talks

26. PhD from the BELLE experiment

27. Review etc. B-factory Programme Advisory Committee
8 members ( 2 from Japan, 6 from abroad )
KEKB Review Committee
11 members from abroad

28. L = 8 x 1035 cm-2s-1 Super KEKB Belle II X 40 of KEKB ~300 members
European participation
Austria
Czech republic
Germany
Poland
Russia
Slovenia
I.Adachi (KEK) "SuperKEKB/Belle II" (poster)

29. International Linear Collider
GDE: Global Design Effort
Director: Barry Barish
In KEK
Linear Collider Project Office
ATF/ATF2 (Accelerator Test Facility)
ACFA: Asian Committee for Future Accelerator established in1996