B Physics at a Super B Factory: The Physics Case and Detector David B. MacFarlane DESY Seminar...
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Transcript of B Physics at a Super B Factory: The Physics Case and Detector David B. MacFarlane DESY Seminar...
B Physics at a Super B Factory: The Physics Case and
Detector
David B. MacFarlaneDESY Seminar
November 9, 2004
November 9, 2004 B Physics at a Super B Factory 2
Initial goals for B Factories
Apex at
,
0 0B - B mixing
)B and ( b c
( )b u
0,1 0,0
*arg ; arg ; ubtdV V
2 2 iubud
cbcd
V Ve
V V
2 2(1 ) itbtd
cbcd
V Ve
V V
1
2
3
Exploring CKM picture or alternative origins for CP
violation
November 9, 2004 B Physics at a Super B Factory 3
sin2 results from charmonium modes
BABAR PUB-04/038Update for ICHEP04
sin 2 0 722 0.040 0.023/ 0.950 0.031 0.013
.A A
0( ) (CP odd) modesScc K
1205 on peak or 227 pairs7730 CP events (tagged signal)
fb M BB 1140 on peak or 152 pairs4347 CP events (tagged signal)
fb M BBLimit on direct CPV
sin 2 0 728 0.056 0.023/ 1.007 0.041 0.033
.A A
BBelleelle20032003BBelleelle20032003
BBAABBARARBBAABBARAR
0
0
( ) +( )
S
L
cc Kcc K
Belle CONF-0436
November 9, 2004 B Physics at a Super B Factory 4
Summary of constraints on
Mirror solutions
disfavored
o
From combined
, , results:
9100 10
o
indirect constraint fi t: 98 16
CKM
BABAR & BABAR & Belle Belle
combinedcombined
BABAR & BABAR & Belle Belle
combinedcombined
November 9, 2004 B Physics at a Super B Factory 5
Combined GLW and ADS constraint on
o
indirect constraint
8fi t: 58 7
CKM
o
From combined
GLW and ADS fi t:
2051 34
BABAR & BABAR & Belle Belle
combinedcombined
BABAR & BABAR & Belle Belle
combinedcombined
November 9, 2004 B Physics at a Super B Factory 6
B Factories have been very successful! First precise test for CKM picture of CPV sin2 = 0.726±0.037, precision measurement
(5%) Progress on other angles
from S and Dalitz
o 2 from from (w/ D Daltiz)
And on sideso Paradigm change!
Now: looking for New Physics as
correction to CKM
(*)B D B DK
, ,cb cb dV V m
November 9, 2004 B Physics at a Super B Factory 7
Possible New Physics addition: SUSY MSSM parameters > 100! squark/slepton mass matrix
o Sensitive to SUSY breaking mechanism. o New sources of flavor mixing
2q ij
m
211m 2
12m 213m
221m 2
22m 223m
231m 2
32m 233m
[masses + mixing angles + phases]
iq jqiq jq
2q 23(13)(m )
Off-diagonal termsFlavor Physics atluminosity frontierDiagonal terms:LHC/ILC atenergy frontier
b and are both 3rd generation:probe both 32, 31 transitions
November 9, 2004 B Physics at a Super B Factory 8
Potential New Physics contributions
0B
b ss
sd
d
W
g
, ,u c t
“Internal Penguin”
0SK
0B
0SK
0 0 B K
0 0 B K
0SK
0B
b
s
s
sd d
0SK
0B
b
s
s
sd d
SUSY contribution with new phases
New physics in loops?
November 9, 2004 B Physics at a Super B Factory 9
Averages for sin2 and s-penguin modes
3.6s from s-penguin to sin2b
(cc)
No sign of Direct CP in averages
November 9, 2004 B Physics at a Super B Factory 10
PEP-II integrated luminosity
(as of July 4, 2004)~245 million BB pairs
PEP-II Records
Peak luminosity
0.923x1034 cm-2 s-1
Best shift 246.3 pb-1
Best day 710.5 pb-1
Best 7 days 4.464 fb-1
Best week 4.464 fb-1
Best month 16.72 fb-1
Best 30 days 17.04 fb-1
BABAR logged 246.4 fb-1
(as of July 31, 2004)
3x design
November 9, 2004 B Physics at a Super B Factory 11
Projected performance of PEP-II
Luminosity (x1034)
0.9 2.4 Units
e+ 3.1 3.1 GeV
e- 9.0 9.0 GeV
I+ 2.45 4.5 A
I- 1.55 2.2 A
(y*) 11 8 mm
(x*) 30 30 cm
Bunch length 10 7.5 mm
# bunches 1588 1700
Crossing angle 0 0 mrad
Tune shifts (x/y)
4.5/7 8/8 x100
rf frequency 476 476 MHz
Site power 40 40 MWJul 04 Jul 07
For 05 & 06 shutdowns:
Additional LER and HER rf stations, vacuum chamber upgrades,
stronger B1 separation field,…
LER photon
stop limit
November 9, 2004 B Physics at a Super B Factory 12
PEP II luminosity projections
2006
0.5 ab-1
1.5 ab-1
2009
0
200
400
600
800
1000
1200
1400
1600
1800
Year
Inte
gra
ted
Lu
min
os
ity
( f
b-1
)
0
5
10
15
20
25
Pe
ak
Lu
min
os
ity
[1
0**
33
]
Yearly Integrated Luminosity [fb-1]
Cumulative Integrated Luminosity [fb-1]
Peak Luminosity [10**33]
Yearly Integrated Luminosity [fb-1] 3 23 41 39 62.6 107.3 109.6 187.8 298.6 331.3 339.5
Cumulative Integrated Luminosity [fb-1] 3 26 67 106 168.6 275.9 385.5 573.3 871.9 1203.2 1542.7
Peak Luminosity [10**33] 1 2 4.4 5 7.5 10 13 18 21 23 23
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
November 9, 2004 B Physics at a Super B Factory 13
KEKB luminosity projections
44 fb-1/month
24 fb-1/month
18 fb-1/month
Crab cavity
beam test
Integrated 1 ab-1
November 9, 2004 B Physics at a Super B Factory 14
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40Ja
n-03
Jul-
03
Jan-
04
Jul-
04
Jan-
05
Jul-
05
Jan-
06
Jul-
06
Jan-
07
Jul-
07
Jan-
08
Jul-
08
Jan-
09
Jul-
09
Err
or
on
sin
e am
pli
tud
eProjections for penguin modes
K*
5 discovery region if non-SM physics is 30% effect
2004=240 fb-1
2009=1.5 ab-1
Similar projections for Belle as
well
Projections are statistical errors only; but systematic errors at few percent
level
Luminosity expectation
s:
20092004
( ) 0.30S f0KS
KS0
KS
’KS
KKKS
November 9, 2004 B Physics at a Super B Factory 15
Opportunities for Super B Factory Current program of PEP-II/BABAR and KEKB/Belle
could attain ~1-2 ab-1 by end of the decadeo Data samples will be about 6x larger than now and 100-200x
times larger than CLEO
o With such a large increase in sensitivity to rare decays, expect that there is a significant discovery potential
o Rich program of flavor physics/CP violation to be pursued
Even larger samples may offer opportunity to search for new physics in CP violation and rare decayso High-luminosity asymmetric e+e- colliders with luminosities
1035-1036 cm-2s-1 and up to 10 ab-1/year – “Super B Factory”o Emphasis on discovery potential and complementarity in an era when LHC is operating, along with LHCb and BTeV (?)
o Complementary flavor physics if LHC discovers SUSY, etc; discovery window if no new physics seen?
November 9, 2004 B Physics at a Super B Factory 16
Interaction regionCrab crossing = 30 mrady* = 3 mmNew QCS
Super-KEKB upgrades
New beam pipe
Damping ring
More rf power
LOI (Jan 04) for SuperKEKB [http://belle.kek.jp/superb/]
Ante-chamber & solenoid coils for reduction of electron cloud
Linac upgrade
November 9, 2004 B Physics at a Super B Factory 17
Super KEKB luminosity projection
Integrated 10 ab-1
450 fb-1/month
52 fb-1/month44 fb-1/month
24 fb-1/month
Crab cavity
beam test
14 month shutdown
Lpeak (cm-2s-1)1.4x1034 3x1034 2.5x1035
Now
November 9, 2004 B Physics at a Super B Factory 18
BABAR Roadmap Study: Jan – July 04 Defining physics case for Super B Factory
o Emphasis on sensitivity to new physics in CP violation & rare decays
o Emphasis on need & capability for precision SM measurements
Requirements of viable project planso Estimates for duration of approval and funding processo Collider options and upgrade capabilitieso Detector capabilities & requirements in light of projected
backgroundso Integrated scenarios for collider and detector construction,
with implications for time to first data Projections of physics reach in light of
competition & other opportunitieso Projections of samples and sensitivities; analysis of
physics reach
November 9, 2004 B Physics at a Super B Factory 19
SLAC options for High-Luminosity B Factory
Luminosity (x1034)
0.9 2.4 15 25 70 Units
e+ 3.1 3.1 3.1 3.5 8.0 GeV
e- 9.0 9.0 9.0 8.0 3.5 GeV
I+ 2.45 4.5 8.7 11.0 6.8 A
I- 1.55 2.2 3.0 4.8 15.5 A
(y*) 11 8 3.6 3.0 1.5 mm
(x*) 30 30 30 25 15 cm
Bunch length 10 7.5 4 3.4 1.7 mm
# bunches 1588 1700 1700 3450 6900
Crossing angle 0 0 0 11 15 mrad
Tune shifts (x/y)
4.5/7 8/8 11/11 11/11 11/11 x100
rf frequency 476 476 476 476 952 MHz
Site power 40 40 75 85 100 MWJ.Seeman Jul 04 Jul 07 LERvacuum
+IR +HER vacuum, 952MHz rf
November 9, 2004 B Physics at a Super B Factory 20
SLAC options for High-Luminosity B Factory
Luminosity (x1034)
0.9 2.4 15 25 70 Units
e+ 3.1 3.1 3.1 3.5 8.0 GeV
e- 9.0 9.0 9.0 8.0 3.5 GeV
I+ 2.45 4.5 8.7 11.0 6.8 A
I- 1.55 2.2 3.0 4.8 15.5 A
(y*) 11 8 3.6 3.0 1.5 mm
(x*) 30 30 30 25 15 cm
Bunch length 10 7.5 4 3.4 1.7 mm
# bunches 1588 1700 1700 3450 6900
Crossing angle 0 0 0 11 15 mrad
Tune shifts (x/y)
4.5/7 8/8 11/11 11/11 11/11 x100
rf frequency 476 476 476 476 952 MHz
Site power 40 40 75 85 100 MWJ.Seeman Jul 04 Jul 07 LERvacuum
+IR +HER vacuum, 952MHz rf
Ch
osen
Op
tion
November 9, 2004 B Physics at a Super B Factory 21
Possible Timeline for Super PEP Program
LOI
Construct upgrades for
L = 5-7x1035
-1~10 ab / yrLdt
Super-B Progra
m
CDR
Installation
R&D, Design, Proposals and
Approvals
P5
Construction
2001 2003 2010200820062005
Planned PEP-II Program
-1140 f bLdt -1500 f bLdt -1~1 2 abLdt
(June 30, 2003) (End 2006) (PEP-II ultimate)
Commission
2012
Super B Operation
2011
November 9, 2004 B Physics at a Super B Factory 22
Considerations for detector systems Extrapolation of backgrounds with and
without luminosity component; spatial and/or angular distributions if significant;
Performance degradation with occupancy and projected limits; likewise radiation damage and projected limits;
Detector options for 5-10x1035 machines.
What are limits of current technologies?
Long extrapolation from current background studies, which include significant luminosity-
dependent componentDepends critically on design of
interaction region, beam separation scheme
November 9, 2004 B Physics at a Super B Factory 23
BABAR Detector
DIRC PID)144 quartz
bars11000 PMs
1.5T solenoid
EMC6580 CsI(Tl) crystals
Drift Chamber40 layers
Instrumented Flux Return
iron / RPCs or LSTs (muon / neutral hadrons)
Silicon Vertex Tracker
5 layers, double sided strips
e
(3.1GeV)
e (9GeV)
November 9, 2004 B Physics at a Super B Factory 24
Interaction region design
PEP-II Head-On IR Layout
o SR in bend & quadrupole magnets
o Current dependent terms due to residual vacuum
November 9, 2004 B Physics at a Super B Factory 25
87.57
6.56
5.5
4
3.532.5
21.51
0.5
4.55
HER Radiative Bhabhas
-7.5 -5 -2.5 0 2.5 5 7.5
0
10
20
30
-10
-20
-30
m
cm
M. SullivanFeb. 8, 2004API88k3_R5_RADBHA_TOT_7_5M
3.1 G
eV
3.1 G
eV
9 GeV
9 GeV
Luminosity-dependent backgrounds
o SR in bend & quadrupole magnets
o Current dependent terms due to residual vacuum
o Bhabha scattering at IP
PEP-II Head-On IR Layout
November 9, 2004 B Physics at a Super B Factory 26
PEP-II 1036 B-Factory +/- 12 mrad xing angle Q2 septum at 2.5 m
30
20
10
0
-10
-20
-30
cm
-7.5 -5 -2.5 0 2.5 5 7.5m 31-JAN-2002
M. Sullivan
Q1
Q1Q1
Q1
Q2
Q4
Q5Q2
Q4Q5 e+
e-
IR concept for a Super B-Factory
M.Sullivan
±12 mr crossing angle
o No background calculations yet
Can luminosity component be reduced?
November 9, 2004 B Physics at a Super B Factory 27
SVT backgrounds: top module
SVT Occupancy (Top)
0
40
80
120
160
200
240
8 200 700 1000Luminosity (10E33)
Oc
cu
pa
nc
y (
%)
100%
50%
20%
10%
0%
Lumi term
DANGER with 4x granularity increase
Assumes striplets increase granularity 4-fold
November 9, 2004 B Physics at a Super B Factory 28
Monolithic Active Pixels Option for very high luminosity is MAPS =
Monolithic Active Pixels = sensor and electronics on the same substrate.o R&D on monolithic pixels has started in several places.
Possible approaches:o Integrate electronics on the high resistivity substrate
usually employed for sensors• Active components are not of the best quality• The fabrication process is highly non-standard with
large feature size (>1-2mm)o Use the low resistivity substrate of standard CMOS process
as sensor• Can use standard sub-micron process with state-of-the-
art electronics
Far from a proven technology: fundamental R&D required
November 9, 2004 B Physics at a Super B Factory 29
DCH occupancy based on 2004 studies
Based on 2004 Fits
0
20
40
60
80
100
120
7 33 200 700 1000
Lumi
HER
LER
Based on 2004 Fits
0
5
10
15
20
25
30
35
7 33 200 700 1000
20% Lumi
HER
LER
N_LER [%]
N_HER [%]
N_BEAM [%]
N_LUMI [%]
20% L [%]
N_DCH [%]
N_DCH [%] 20%L
0.7 1 6 7 3 1 10 73.3 2 9 11 15 3 26 1420 1 5 6 23 5 28 1070 2 7 8 79 16 87 24
100 2 10 12 90 18 102 30
4 x cells 4 x cells
100% Lumi term
20% Lumi term
November 9, 2004 B Physics at a Super B Factory 30
Options for beyond 2x1035
Replace wire chamber by all silicon trackingo Leave SVT geometry unchanged; replace DCH with 4-layer
silicon tracker with lampshade modules. Remove support tube
o Radii of barrel part of SVT modules: 3.3, 4.0, 5.9, 12.2, 14.0 cm
o Radii of barrel part of CST modules: 25,35,45,60 cm
Current detector
60 cm
All silicon tracker
November 9, 2004 B Physics at a Super B Factory 31
Momentum resolution
Central Silicon Tracker Performance
0.001
0.01
0.1
0 1 2 3 4 5 6
Ptot(GeV)
Sig
mak
(Gev
-1)
CST-100.300
CST050-nosupp
CST100-nosupp
CST100
CST200
CST300
CST300-small
S-DCH Present detecto
r
Future?
November 9, 2004 B Physics at a Super B Factory 32
Calorimeter background projections
Integrated Luminosity
(2008) 1 ab-1
(2x1035) 10 ab-1
(1036) 100 ab-1
BackwardBarrel
0.88 0.78 X
ForwardBarrel
0.82 0.61 X
Endcap Small rings
0.82 0.69 X
Endcap Large rings
0.71 0.53 X
Degradation of light output with luminosity
Is this a functional
EMC?
Radiation Damage Projections
2x10
35
7x10
35
10
36
Versus ~8 physics clusters
Occupancy Projections
EMC lifetime limit: about 20 ab-1
November 9, 2004 B Physics at a Super B Factory 33
Radiation-hard calorimeter options
Lutetium (+Yttrium) OxyOrthosilicate [LSO or LYSO]o Fast light output in 40ns; solves occupancy problem.o Smaller radiation length 1.15cm (CsI 1.86cm) and Moliere
radius 2.3 cm (CsI 3.8cm)o Believed to be radiation hard to 100MRad!o Currently cost is ~$40/cc; pushes radius towards 700mm
Liquid Xenono Fast light output again, within ~20ns. o Radiation length is 2.9cm: need all of radial space
between 700 and 1350mm for cryostat, liquid Xenon and readout.
o Moliere radius 5.7cm: long. sampling to separate overlaps. o Cost of Liquid Xenon is $2.5/ccBoth Rad Hard crystal and Liquid Xenon options require EMC inner radius reduction to about 70cm: need to replace DRC
bars as well
November 9, 2004 B Physics at a Super B Factory 34
Muon/KL upgrades
Forward endcap RPCs will not survive 2x1035
o Outer layers see large LER background (part of which will be shielded after summer 2004)
o Inner layers see large Lumi background at small radii Plan already in the works to replace forward
endcap with LSTs (in avalanche mode) Barrel LSTs installed in summer 2004 and
again summer 2005 should be ok for all scenarios
Not clear if there is interest in replacing backward endcap RPCs due to limited acceptance loss
November 9, 2004 B Physics at a Super B Factory 35
Super PEP upgrade plan
LER replacement
5.0 7.0 x 1035
+ HER replacement
SVT striplets
+ 952 MHz rf
Silicon outer tracker
Rad Hard EMC
DRC replacement
2.5
Performance limit
Operational goal
November 9, 2004 B Physics at a Super B Factory 36
Super PEP upgrade plan
LER replacement
5.0 7.0 x 1035
+ HER replacement
SVT striplets
+ 952 MHz rf
Thin pixels
Silicon outer tracker
Rad Hard EMC
DRC replacement
2.5Operational goal
November 9, 2004 B Physics at a Super B Factory 37
Important factors in upgrade direction Project is “tunable”
o Can react to physics developmentso Can react to changing geopolitical situation
• Project anti-commutes with linear collider• Will emerge from BABAR and Belle, but could be attractive
to wider community in context of other opportunitieso As we learn more about machine and detector requirements
and design, can fine tune goals and plans within this framework
Project has headroomo Major upgrades to detector and machine, but none
contingent upon completing fundamental R&Do Headroom for detector up to 5 x 1035; with thin pixels beyondo Headroom for machine up to 8.5 x 1035; requires additional rf,
which can be staged into machine over time
November 9, 2004 B Physics at a Super B Factory 38
Super KEKB upgrade plan
Vacuum pipe, linac, damping rings, additional rf
SVT striplets
Wire chamber
CsI EMC endcap
TOP + RICH
2.5 x 1035
Operational goal
Less ambitious, but simpler with fewer
machine and detector upgrades
November 9, 2004 B Physics at a Super B Factory 39
Physics capabilities: angle projectionsUnitarity Triangle Angles [degrees]
e+e-
[ab-1]Hadronic b
[1yr]
Measurement 3 10 50 LHCb
() (SBBR’s isospin)
6.7 3.9 2.1 - -
() (penguin, isospin, stat+syst)
2.9 1.5 0.72
(J/KS) (all modes) 0.3 0.17 0.09 0.57 0.49
(BD(*)K) (ADS) 2-3 ~10 <13
(all methods) 1.2-2
1.6, 1.3 1, 0.6 2.5 -5
BTeV
() (Isospin, Dalitz) (syst 3)
3, 2.3 4
Theory: ~ 5%, ~ 1%, ~ 0.1%
November 9, 2004 B Physics at a Super B Factory 40
T.Iijima @FPCP
Unitarity Triangle from Super-B
sin2 0.019
( ) 0.011 0.026| | 5.8%
4
B d
ub
f BV
sin2 0.014
( ) 0.005 0.015| | 4.4%
1.2
B d
ub
f BV
5 ab-1 50 ab-1
Vub &
sin2 & md
Vub &
sin2 & md
November 9, 2004 B Physics at a Super B Factory 41
CP Violation in bs penguinsRare Decays, New Physics, CPV [%]
e+e-
[ab-1]Hadronic b
[1yr]
Goal
SM: <5
S(B0KS+KL) SM: <5
S(BKs0) SM: <5 8.2 5 4
S(BKs0) SM: <2 11.4 6 4
ACP (bs) SM: <0.5 2.4 1 0.5
ACP(BK*) SM: <0.5 0.59 0.32 0.14 - -
CPV in mixing (|q/p|)
<0.6 - -
S(B'Ks ) SM: <5 5.7 3 1
Measurement 3 10 50 LHCb
8.7 3.9 16 (?)
BTeV
S(B0KS) 16 7 (?)
November 9, 2004 B Physics at a Super B Factory 42
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20Ja
n-03
Jan-
04
Jan-
05
Jan-
06
Jan-
07
Jan-
08
Jan-
09
Jan-
10
Jan-
11
Jan-
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Jan-
13
Jan-
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Jan-
15
Jan-
16
Err
or
on
sin
e am
pli
tud
eProjections for Super B Factory
f0KS
KS0
KS
’KS
KKKS
K*
5 discovery region if non-SM physics is 15% effect
Super B Factory 5-7x1035 cm-2s-1
Projections are statistical errors only; but systematic errors at few percent
level
Luminosity expectation
s:
20122004
( ) 0.15S
Scale chang
e!
November 9, 2004 B Physics at a Super B Factory 43
ACP(BKS) vs SUSY models
5 ab-1
50 ab-1
Current
AC
Pm
ix
mSUGRAtan = 30
U(2)tan = 30
SU(5)+R
tan = 30nondegenerate
SU(5)+R
tan = 30degenerate
( )gm GeV
November 9, 2004 B Physics at a Super B Factory 44
ACP(BXS) vs SUSY models
( )gm GeV ( )gm GeV
AC
Pm
ix
AC
Pm
ix
5 ab-1 50 ab-1
Direct CPV Mixing CPV
mSUGRAtan = 30
U(2)tan = 30
SU(5)+R
tan = 30nondegenerate
SU(5)+R
tan = 30degenerate
mSUGRAtan = 30
U(2)tan = 30
SU(5)+R
tan = 30nondegenerate
SU(5)+R
tan = 30degenerate
November 9, 2004 B Physics at a Super B Factory 45
Pattern of deviation from SM prediction
Bd unitari
ty
ms BKS BMS indirec
t CP
bs direct
CP
mSUGRA - - - - - +
SU(5) SUSY GUT + R (degenerate)
- + + - + -
SU(5) SUSY GUT + R (nondegenerate)
- - + ++ ++ -
U(2) flavor symmtry + + + ++ ++ ++
Unitarity Triangle Rare Decays
++ Large; + Sizable, - SmallY.Okada
November 9, 2004 B Physics at a Super B Factory 46
CP Violation in bs penguinsRare Decays, New Physics, CPV [%]
e+e-
[ab-1]Hadronic b
[1yr]
Goal
SM: <0.25
S(B0KS+KL) SM: <0.25
S(BKs0) SM: <0.2 8.2 5 4
S(BKs0) SM: <0.1 11.4 6 4
ACP (bs) SM: <0.5 2.4 1 0.5
ACP(BK*) SM: <0.5 0.59 0.32 0.14 - -
CPV in mixing (|q/p|)
<0.6 - -
S(B'Ks ) SM: <0.3 5.7 3 1
Measurement 3 10 50 LHCb
8.7 3.9 16 (?)
BTeV
S(B0KS) 16 7 (?)
Discovery potential at Super B for non-SM physics
November 9, 2004 B Physics at a Super B Factory 47
More Rare decays precisionRare Decays – New Physics
e+e- [ab-1]
Hadronic b [1 yr]
Goal
(bd) / (bs)
- -
(Bd ) - - 1-2 evts
1-2 evts
(Bd ) - - - -
() <10-8 - -
SM:8x10-3
SM: ~5%1 excl: 4x10-6
Measurement 3 10 50 LHCb
5.6% 2.5%
(Bs)(K-,0,K*-,0)
~3 - -
(Binvisible) <2x10-6 <1x10-6 <4x10-7 - -
-
BTeV
BD(*)) 10.2% -
November 9, 2004 B Physics at a Super B Factory 48
Lepton Flavor Violation
( )e
0
( )e
( )s
( )s
h
223(13)( )m
2 3( - )2 2
2323 LR
id
m m e
LFV in neutrino sector already seen (at maximal
mixing)
LFV in charged leptons?
SM “zero”: good place to look for NP
Tau lepton is heaviest & 3rd generation
o Rate enhancement
o Probes 32() & 31(e) transition
SUSY GUT: correlation to bs transition
4. ., ( ) 10 ( )e g BF BF e
November 9, 2004 B Physics at a Super B Factory 49
Tau LFV search
, ,
3
03 SK ,B B
Searches reach BF sensitivity ~10-8 with 10 ab-1
CLEOCurrent10 ab-1
Improved
analysis?
T.Iijima @FPCP
November 9, 2004 B Physics at a Super B Factory 50
More Rare decays precisionRare Decays – New Physics
e+e- [ab-1]
Hadronic b [1 yr]
Goal
(bd) / (bs)
- -
(Bd ) - - 1-2 evts
1-2 evts
(Bd ) - - - -
() <10-8 - -
SM:8x10-3
SM: ~5%1 excl: 4x10-6
Measurement 3 10 50 LHCb
5.6% 2.5%
(Bs)(K-,0,K*-,0)
~3 - -
(Binvisible) <2x10-6 <1x10-6 <4x10-7 - -
-
BTeV
BD(*)) 10.2% -
Discovery potential at Super B for non-SM physics
Discovery potential at Super B for non-SM physics
November 9, 2004 B Physics at a Super B Factory 51
bsl+l- precision
New Physics – Kl+l-, sl+l-
[%]e+e- [ab-1]
Hadronic b [1 yr]
Goal
(BK) /(BKe+e-) SM: 1 ~8 ~4 ~2 - -
ACP(BK*+-): high mass
SM:<5
~12 ~6 ~3 ~3 ~4
AFB(Bs+-): ŝ0 27 15 6.7
ACP(BK*+-): all SM:<5
~6 ~3 ~1.5 ~1.5 ~2
AFB(BK*+-): s0
AFB(BK*+-): ACP
SM: ±5
~20 ~9 9 ~12
Measurement 3 10 50 LHCb
AFB(Bs+-): C9 , C10 36-55 20-30 9-13
BTeV
November 9, 2004 B Physics at a Super B Factory 52
bsl+l- precision
New Physics – Kl+l-, sl+l-
[%]e+e- [ab-1]
Hadronic b [1 yr]
Goal
(BK) /(BKe+e-) SM: 1 ~8 ~4 ~2 - -
ACP(BK*+-): high mass
SM:<5
~12 ~6 ~3 ~3 ~4
AFB(Bs+-): ŝ0 27 15 6.7
ACP(BK*+-): all SM:<5
~6 ~3 ~1.5 ~1.5 ~2
AFB(BK*+-): s0
AFB(BK*+-): ACP
SM: ±5
~20 ~9 9 ~12
Measurement 3 10 50 LHCb
AFB(Bs+-): C9 , C10 36-55 20-30 9-13
BTeV
Discovery potential at Super B for non-SM physics
November 9, 2004 B Physics at a Super B Factory 53
Conclusions
Strong physics case for Super B Factoryo Program rests on ability to explore of new physics through
flavor couplings and phases• Complementary to LHC collider experiments• Complementary to hadron b experiments; could even
be viewed as natural successoro Precision Standard Model physics a second fundamental
pillar of programo Builds on proven track record of high-luminosity storage
rings and general purpose e+e- detectorso Builds on our present knowledge of CP violation and rare B
decays; expect that case will only strengthen as we explore ever increasing data samples over the next few years
Feasible & complementary to LHC/ILC for exploring New Physics
November 9, 2004 B Physics at a Super B Factory 54
Conclusions
Arguments will evolve with time and datao Perhaps our data is already hinting at new physics, which
will motivate further precision studies of flavor physicso Perhaps LHC will directly see new physics, with new
couplings and phases that need to be explored at a Super B Factory
Next Stepso Working towards merging Super B efforts with Belle and
engaging wider community in exploring physics capabilities
o Super KEKB seeking approval and funding in Japano Super PEP moving to develop a conceptual and technical
design for a very high luminosity facility
Joint Super B Workshop in Hawaii in spring 2005
Aim is to get a Super B Factory operational early in the next decade
November 9, 2004 B Physics at a Super B Factory 55
References
o EOI and LOI (KEK-Report 2004-04, Jan 04) for SuperKEKB [http://belle.kek.jp/superb/]
o “Physics at Super B Factory”, hep-ex/0406071
o Super B Workshop in Hawaii (Jan 04) [http://www.phys.hawaii.edu/~superb04/]
o BABAR Roadmap Report (Jul 04)o SLAC 1036 Workshop (available shortly)o T.Iijima’s talk on Super B Factories at
FPCP05
Backup Slides
November 9, 2004 B Physics at a Super B Factory 57
Projecting Physics Reach
Working assumptions for projectionso LHCb:
• Start in Jan 2008 with 50% of design for 2 yearso BTEV:
• Start in Jan 2010 with 50% of design for 2 yearso Rolling start for Super B Factory:
• Oct 2011 = 2.5x1035
• Oct 2012 = 5x1035
• Oct 2013 = 7x1035 with replacement of inner SVT by thin pixel device
November 9, 2004 B Physics at a Super B Factory 58
0.00E+00
1.00E+03
2.00E+03
3.00E+03
4.00E+03
5.00E+03
6.00E+03
7.00E+03
8.00E+03
9.00E+03
1.00E+04
Jan-
03
Jul-0
3
Jan-
04
Jul-0
4
Jan-
05
Jul-0
5
Jan-
06
Jul-0
6
Jan-
07
Jul-0
7
Jan-
08
Jul-0
8
Jan-
09
Jul-0
9
Jan-
10
Jul-1
0
Jan-
11
Jul-1
1
Jan-
12
Jul-1
2
Jan-
13
Jul-1
3
Jan-
14
Jul-1
4
Jan-
15
Jul-1
5
Jan-
16
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.20
Projections for +-Eff
ecti
ve n
um
ber
of
tag
ged
even
ts
Err
or
on
sin
e a
mp
litu
de
PEP-II, KEKB Super B-Factory 10/2011
SuperB
November 9, 2004 B Physics at a Super B Factory 59
0.00E+00
1.00E+03
2.00E+03
3.00E+03
4.00E+03
5.00E+03
6.00E+03
7.00E+03
8.00E+03
9.00E+03
1.00E+04
Jan-
03
Jul-0
3
Jan-
04
Jul-0
4
Jan-
05
Jul-0
5
Jan-
06
Jul-0
6
Jan-
07
Jul-0
7
Jan-
08
Jul-0
8
Jan-
09
Jul-0
9
Jan-
10
Jul-1
0
Jan-
11
Jul-1
1
Jan-
12
Jul-1
2
Jan-
13
Jul-1
3
Jan-
14
Jul-1
4
Jan-
15
Jul-1
5
Jan-
16
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.20
Projections for K*Eff
ecti
ve n
um
ber
of
tag
ged
even
ts
Err
or
on
sin
e a
mp
litu
de
PEP-II, KEKB Super B-Factory 10/2011
SuperB
November 9, 2004 B Physics at a Super B Factory 60
0.00E+00
1.00E+03
2.00E+03
3.00E+03
4.00E+03
5.00E+03
6.00E+03
7.00E+03
8.00E+03
9.00E+03
1.00E+04
Jan-
03
Jul-0
3
Jan-
04
Jul-0
4
Jan-
05
Jul-0
5
Jan-
06
Jul-0
6
Jan-
07
Jul-0
7
Jan-
08
Jul-0
8
Jan-
09
Jul-0
9
Jan-
10
Jul-1
0
Jan-
11
Jul-1
1
Jan-
12
Jul-1
2
Jan-
13
Jul-1
3
Jan-
14
Jul-1
4
Jan-
15
Jul-1
5
Jan-
16
Tagged Sample Projections for K0Eff
ecti
ve n
um
ber
of
tag
ged
even
ts
SuperBLHCbBTEV
November 9, 2004 B Physics at a Super B Factory 61
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.20Ja
n-03
Jul-0
3
Jan-
04
Jul-0
4
Jan-
05
Jul-0
5
Jan-
06
Jul-0
6
Jan-
07
Jul-0
7
Jan-
08
Jul-0
8
Jan-
09
Jul-0
9
Jan-
10
Jul-1
0
Jan-
11
Jul-1
1
Jan-
12
Jul-1
2
Jan-
13
Jul-1
3
Jan-
14
Jul-1
4
Jan-
15
Jul-1
5
Jan-
16
Error Projections for K0Err
or
on
sin
e a
mp
litu
de
PEP-II, KEKB
Super B-Factory 10/2011SuperBLHCbBTEV
November 9, 2004 B Physics at a Super B Factory 62
0.00E+00
1.00E+03
2.00E+03
3.00E+03
4.00E+03
5.00E+03
6.00E+03
7.00E+03
8.00E+03
9.00E+03
1.00E+04
Jan-
03
Jul-0
3
Jan-
04
Jul-0
4
Jan-
05
Jul-0
5
Jan-
06
Jul-0
6
Jan-
07
Jul-0
7
Jan-
08
Jul-0
8
Jan-
09
Jul-0
9
Jan-
10
Jul-1
0
Jan-
11
Jul-1
1
Jan-
12
Jul-1
2
Jan-
13
Jul-1
3
Jan-
14
Jul-1
4
Jan-
15
Jul-1
5
Jan-
16
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.20
Projections for +-
(S) Lint
Eff
ecti
ve n
um
ber
of
tag
ged
even
ts
Err
or
on
sin
e a
mp
litu
de
SuperBLHCbBTEV
PEP-II, KEKB Super B-Factory 10/2011
November 9, 2004 B Physics at a Super B Factory 63
0.00E+00
5.00E+02
1.00E+03
1.50E+03
2.00E+03
2.50E+03
3.00E+03
3.50E+03
Jan-
03
Jul-0
3
Jan-
04
Jul-0
4
Jan-
05
Jul-0
5
Jan-
06
Jul-0
6
Jan-
07
Jul-0
7
Jan-
08
Jul-0
8
Jan-
09
Jul-0
9
Jan-
10
Jul-1
0
Jan-
11
Jul-1
1
Jan-
12
Jul-1
2
Jan-
13
Jul-1
3
Jan-
14
Jul-1
4
Jan-
15
Jul-1
5
Jan-
16
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
Projections for 2-Body Isospin Analysis
() Lint
Eff
ecti
ve n
um
ber
of
tag
ged
even
ts
Err
or
on
delt
a [
deg
rees]
SuperB
November 9, 2004 B Physics at a Super B Factory 64
Trickle injection at the B Factories
Best shift, no trickle
PEP-II: ~5 Hz continuousKEKB: at ~5-10 min intervals
Best shift, LER only trickleNov 2003
Best shift, double trickleMar 2004
PEP-II LumiHER currentLER current
November 9, 2004 B Physics at a Super B Factory 65
Summary of upgrade scenarios
L (nb-1s-1) ILER (A)y*
(mm)y
P (MW)
Present Performance
PEP-II 7 1.8 12 0.05 ~40 Head-on
KEKB 11 1.6 6 0.05 ~50 ±11 mrad
Upgrade before 2007 (without major funding issues)
PEP-II 24 4.5 6 0.05 ~60 Head-on
KEKB 30 1.6 6 0.14 ~50 Crab-crossing
Major Upgrade
Super PEP-II
700 23 1.5 0.10 ~100
High freq rf, new beam
pipes & magnets, crossing
angle
Super KEKB
250 9.4 3 0.14 ~90
New beam pipe, more rf,
linac, damping ring
November 9, 2004 B Physics at a Super B Factory 66
Impact on E resolution
0B
0 * *B D D 0 0
SB K
Channel Now All Silicon
22 37
6 9
13 25
First look at impact on CP violation in
Error on S and C are degraded by about 5%
E Resolution
November 9, 2004 B Physics at a Super B Factory 67
New Physics mass-scale sensitivity
KS now
KS 30 ab-1
Ciuchini, Franco, Martinelli, Masiero, & Silvestrini
0 0 0 / S SCPA J K K 0 0 / S SCPA J K K
November 9, 2004 B Physics at a Super B Factory 68
Search for charged Higgs
Band widths from form-factor
uncertainty
( )B D semileptonic decay ( )tan cotb c um m
tanm
b c
/H W
o Fully reconstruct tagging Bo Signal is large missing mass
5 ab-1
Mode Nsig Bbkd B/B
280 550 7.9%620 3600
0 ( ) D
0 ( ) D h
T.Iijima @FPCP
November 9, 2004 B Physics at a Super B Factory 69
Sensitivity for Charged Higgs
(f orm-f actor)can be reducedwith present
dataB D
LHC 100fb-1
Constraint f rom SB X B D
now B
form-factor) ~ 15%
form-factor) ~ 5%
T.Iijima @FPCP
November 9, 2004 B Physics at a Super B Factory 70
tan = 30, A0 = 0, > 0Gaugino mass = 200 GeV
Now Super B
,3 ,
2
32
4
262
1t10 n) a( L
S YL US
BFm
Tem Vm
o SUSY + Seasawo Large LFV
7 9( ) 10 to 10BF
4627 32
2
tan 10060
( 3 )
4 10A
L
L
B
Ge
F
m
mV
m
3 ,
o Neutral Higgs mediated decayo Important when mSUSY >> EW scale
( ) : ( 3 ) : ( ) 5 :1: 0.5BF BF BF
T.Iijima @FPCP