super b factory @ kek - super kekb - b.g. cheon (hanyang univ., seoul) for the belle collaboration...

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Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project schedule June 16-21, SUSY08 @ Seoul, Korea

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Page 1: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Super B factory @ KEK- Super KEKB -

B.G. Cheon

(Hanyang Univ., Seoul)

For the Belle collaboration

Physics motivation Accelerator and Detector Project schedule

June 16-21, SUSY08 @ Seoul, Korea

Page 2: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Belle highlights

SMBelle, 2005

AFB in BK*ll

X(3872)

Many new resonances

bdtransition

Evidence for B

Z(4430)

BD*D0-D0 mixing

CPV discovery

And more …

belle.kek.jp

Page 3: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Why KEK Super B factory ?

Many questions still remain in the SM. Something beyond SM should be there. Need more data to answer the questions.

KEKB/Belle achievement ~ 0.85 ab-1

Initial target ~ 10 ab-1 (limited funding) Final target ~ 50 ab-1

Page 4: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project
Page 5: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Physics at KEK Super B factory

New source ofNew source ofCP violationCP violation

New source of New source of flavor mixingflavor mixing

LFV LFV decays decays

SUSY breaking SUSY breaking mechanismmechanism

Precision test Precision test of KM schemeof KM scheme

Super-highSuper-high statistics statisticsmeasurements:measurements:

SS, sin, sin22WW, etc., etc.

Charm physicsCharm physics New resonances,New resonances, DD00DD00 mixing… mixing…

Page 6: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Item Super KEKB LHCb

BSM CP phase tCPV in b s penguin (Ks, ’ Ks, …)

Bs

BSM right-handed current tCPV in B K* Bs

Charged Higgs B B D(*) *

Inclusive measurements b s, b d, b sll *

D0-D0bar Mixing, DCPV Super-high statistics D decays O

Lepton Flavor Violation Super-high statistics decays *

BSM sensitive measurements

* Decay modes including / / can be accessed only with e+e- machines.

Flavor physics review talks are waiting for us on Wed. !!!

Page 7: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

One example to find BSM Phases

SM: sin21 = sin21 from BJ/ K0 (bc c s)

unless there are other, non-SM particles in the loop

eff

Vts: no KM phase

Vtd

Vtd

+

1

B B

, ’,

1

, ’,

_

*

*

Page 8: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

BSM effect may enter in b s

0SK

0B

b

s

s

sd d

0SK

0B

b

s

s

sd d

Many new phases are possible in

SUSY

New physics in loops?

O(1) effect allowedeven if SUSY scale is above 2TeV.

Method:

Compare S(K0) with S(J/K0)

SM prediction:

S S(K0)S(J/K0)

Page 9: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Smaller than bccs in 7 of 9 modesSmaller than bccs in 7 of 9 modes

Hints of NP in b s penguins ?

Theory predicts positive shifts

Naïve average of all b s modes

sin2eff = 0.56 ± 0.05

2.2 deviation from SM(CL=3%)

Naïve average of all b s modes

sin2eff = 0.56 ± 0.05

2.2 deviation from SM(CL=3%)

Page 10: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Integrated Luminosity

PEP-IIfor BaBar

KEKBfor Belle

KEKB + PEP-II

~ 1.4 Billion BB pairs~840/fb (Jun/10/08)~840/fb (Jun/10/08)

~531/fb (Apr/7/08)~531/fb (Apr/7/08)

design lu

minosity

May be time to switch units to ab-1Lpeak (KEKB) = 1.7 x 1034/cm2/sec (design 1.0)

Page 11: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

KEKB upgrade - Super B factory @ KEK -

Crab cavityCrab cavity

3.5GeV e

8GeV e

New beam-pipeNew beam-pipewith ante-with ante-chamberchamber

DampingDampingring for ering for e++

New IR with crabNew IR with crabcrossing and crossing and

smaller smaller yy**

More RF for higherMore RF for higherbeam currentbeam current

SR

beam

e+ source

Ares RF cavity

SCC RF(HER)

ARES

(LER)

3.5 GeV e+

8 GeV e-

Upgrading the existing KEKB collider 3 years shutdown from 2009 Initial target ~ 2 x 1035/cm2s = 10 x KEKB Luminosity Final goal ~ 8 x 1035/cm2s , Integrated Lum.= 50 ab-1

Many components are now being tested.

Page 12: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

K. Oide

Page 13: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

1st layer

Expected Beam Background

Conservative, robust detector should be handled up to 20 times more background

Rad-Bhabha mask around QCS magnetIR chamber design

Results based on GEANT SIM validated by Belle/KEKB experience.

Page 14: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Features of Super Belle detector

- low p identification s recon. eff.- hermeticity “reconstruction”

- radiation damage and occupancy- fake hits and pile-up noise in the EM

- higher rate trigger, DAQ and computing

Issues: Higher background ( 20)

Higher event rate ( 50)

Required special features

In contrast to LHCb, superb neutral detection capabilities. e.g. BKS0 can be used to dete

ct right-handed currents.

Capable of observing rare “missing energy modes” e.g. BK with B tags.

Page 15: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Super Belle detector

Possible solution: Replace inner layers of the vertex detector with a silicon striplet or pixel detector Replace inner part of the central tracker with a silicon strip detector. Better particle identification device (TOP) focussing DIRC (fDIRC) Replace endcap calorimeter by pure CsI. Faster readout electronics and computing

Possible solution: Replace inner layers of the vertex detector with a silicon striplet or pixel detector Replace inner part of the central tracker with a silicon strip detector. Better particle identification device (TOP) focussing DIRC (fDIRC) Replace endcap calorimeter by pure CsI. Faster readout electronics and computing

New dead time free pipelined readout and

high speed computing systems

Faster calorimeter with waveform sampling and pure CsI crystals

New particle identifier with precise Cherenkov device:

TOP or fDIRC.

Si vertex detector withhigh background

tolerance (striplets or pixels)

Background tolerant super small celltracking detector

KL/ detectionwith scintillator

and next generationphoton sensors

Korean group contribution : Calorimeter trigger system construction CDC Tracker z-trigger system implement SVD silicon strip sensor R&D

Page 16: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

(5 Year Plan)

KEK Web page

+20 page report

Page 17: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

2006 2008 2010 2012 2014 2016 2018

KEK Roadmap

• KEKB

• PF/PF-AR

Detector R&D

• J-PARC

ILCILC R&D

construction

experiment + upgrade

PF-ERL

• R&D for Advanced Accelerator and Detector Technology

ERL

R&D construction experiment

C-ERL R&D

• LHC

construction experiment + upgrade

construction test experiment

experiment upgrade experiment + upgrade

construction experiment + upgrade

upgrade

Very P

relim

inary

Page 18: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

2007 2008 2009 2010

Experiment at KEKB

4 71 10 414 71 104 71 104 71 1010

2011 2012

KEKB/Belle upgrade

DetectorStudy Report(March 08)

Final detectordesign(April 09)

Pre kick-off meeting(March 08)

2007 2008 20094 71 1 42 1010 3 5 8 9 11 12 2 311 12 6

Detector proposals Internal review

TDR

BNM(January 08)

One-day general meeting and an IB meeting at every BGM

Meeting plan

Actions to invite new collaborators

2nd openmeeting(July 08)

Tight Schedule for the Super KEKB Collaboration

(inc. PID shootout)

**

** Possible 6-month shift to the right

Page 19: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Conclusions

Super KEKB is a special opportunity for high impact international collaboration.

KEKB is moving ahead with a machine and detector designed to discover new sources of flavor mixing and CPV.

The accelerator and detector have a track record of exceeding expectations.

Super KEKB and LHCb are complementary.

Page 20: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Backup slides

Page 21: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Major Achievements Expected at SuperKEKB: An Image

Discovery of new CPV phase in B K (for present WA)

Discovery of B K

Discovery of B D

Precise meas. of D mixing

CKM Angle Measurements with 1 degree precision

Discovery of CP Violation in Charged B Decays

Discovery of Direct CP Violation in B0 K Decays (2005)

Discovery of CP Violation in Neutral B Meson System (2001)

Discovery of B

New CP-Violating Phase in b s with 1 degree precision

“Discovery” withsigfinicance > 5

Discovery of New Subatmic Particles

sin2W with O(10-4) precision

Observations with (5S), (3S) etc.

Page 22: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Search for new right-handed currents through CP violation

• SM Electroweak: purely left-handed

• New right-handed current   R

_B0

almost purely left-handed photonalmost purely left-handed photon

Ks 0

described withan amplitudefor a left-handedphoton: L

Interference b/w Land R Large CP violationInterference b/w Land R Large CP violation

Atwood-Gronau-Soni 1997Atwood-Gershon-Hazumi-Soni 2005

Page 23: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Identification of SUSY breaking scenario

Bd- unitarity

m(Bs)

B->Ks B->Ms indirect CP

b->s direct CP

mSUGRA - - - - - +SU(5)SUSY GUT + R

(degenerate)

- + + - + -

SU(5)SUSY GUT + R

(non-degenerate)

- - + ++ ++ +

U(2) Flavor symmetry

+ + + ++ ++ ++++: Large, +: sizable, -: small

Observ-ables

SUSYmodels

Pattern of deviations from the Standard Model Y.Okada

Page 24: Super B factory @ KEK - Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration Physics motivation Accelerator and Detector Project

Principle of a TOP counter

Linear array PMT (~5mm)Time resolution ~40ps

~2m

K

Simulation2GeV/c, =90 deg.

~200ps

Different propagation lengths propagation times

(Measure 1D position and time in a compact detector)Provides ~4σ /K separation at 3.5 GeV/c