1. SuperKEKB Proto-collaboration
Open Meeting for
SuperKEKB Proto-collaboration
March 19-20, 2008
4-gokan, Seminar Hall
KEK

2. Very Preliminary KEK Roadmap J-PARC KEKB LHC PF/PF-AR
2006
2008
2010
2012
2014
2016
2018
J-PARC
construction experiment + upgrade
Very Preliminary
KEKB
experiment upgrade experiment + upgrade
LHC
construction experiment + upgrade
PF/PF-AR
experiment + upgrade
R&D for Advanced Accelerator and Detector Technology
Detector R&D
ERL
C-ERL R&D
construction test experiment
PF-ERL
R&D construction experiment
ILC
ILC R&D
construction

3. High Energy Physics in the Next Decade
Energy frontier experiments
LHC, ILC, …
LHC
ILC
Higgs, SUSY, Dark matter,
New understanding of space-time…
B Factories, LHCb,
K exp., nEDM etc.
KEKB upgrade
CP asymmetry, Baryogenesis,
Left-right symmetry, New sources
of flavor mixing…
New particles
and new interactions
Three approaches to
New Physics
n exp., m LFV, t LFV,
gm-2, 0nbb …
Neutrino mixing/masses,
Lepton number non-conservation…
J-PARC
Lepton
physics
Quark flavor
physics

4. Si vertex detector with
KEKB Upgrade Plan
: Super-B Factory at KEK
Asymmetric energy e+e- collider at ECM=m((4S)) to be realized by upgrading the existing KEKB collider.
Initial target: 10×higher luminosity  21035/cm2/sec
 210 9 BB and t+t- per yr.
Final goal: L=81035/cm2/sec and ∫L dt = 50 ab-1
after 3 year shutdown
Belle with improved rate immunity
Background tolerant
small cell
drift chamber
Faster calorimeter with wave form sampling and pure CsI
Si vertex detector with
very short strips
Crab cavity
3.5GeV e+
8GeV e-
New beam-pipes
with ante-chamber
Damping
ring for e+
New IR with crab
crossing and
smaller by*
More RF for higher
beam current SR
beam

5. Long term strategy Assumption: Crab scheme works as expected.
10 ab-1：Initial target 50 ab-1：Final goal 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22
KEKB upgrade proposed in the Roadmap
Achieving 10 ab-1
Achieving 50 ab-1
Upgrade of machine and detector
Operation + increase of RF
Operation + increase of RF
Another decision：
Physics results
Results from LHC(b)
Situation of LC…
Tem of the Roadmap

6. “New Physics observed at LHC”
Impact of KEKB upgrade in case:
“New Physics observed at LHC”
Detailed measurements
of New Physics effects
in B/D/t decays
KEKB
upgrade
Mass spectra etc.
from LHC exp.
Fundamental symmetries
of the New Physics：
P,CP,CPT
Elucidating new sources
of flavor mixing and CP
violation
Identification of
SUSY breaking
mechanism
CP asymmetry
in B→KKK, fK and h’K
　　　　　 ■　 　●　 　　　　★
Search for H± in B→tn
Obs.
SUSY
Model
mSUGRA
SU(5) SUSY
GUT + nR
(degenerate)
(non-degen.)
U(2) Flavor
symmetry
Unitarity
triangle
B→φKS
Time dep.
CPV in
ｂ→ｓγ
Direct CPV
in ｂ→ｓγ
τ→μγ +
+ + -
+ +: large +: sizable -: small
Y.Okada et al.
0.3
10ab-1 assumed
(3s discovery lim.)
0.1
Deviation from SM
Present
exp. limits
0.03
5ab-1
50ab-1
0.01 1 10
100
Integ. luminosity (ab-1)

7. Flavor physics independent of LHC results
Impact of KEKB upgrade:
Flavor physics independent
of LHC results
Search for New Physics
in precision meas.
KEKB
upgrade
Detailed measurements
of B/D/t decays
2006
Upper limits BR
4Search for lepton number violating
t decay
4Precision test of KM scheme
4D0D0 oscillation and CP violation
in charm
4Test of CPT symmetry
4Multi-quark resonances
4Precision meas. of sin2qW and aS
at ~10GeV
ab-1
2016
Running nature of the fundamental parameters