New Physics in Rare Decays at Belle
description
Transcript of New Physics in Rare Decays at Belle
![Page 1: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/1.jpg)
New Physics in Rare Decays at Belle
Toru Iijima
Nagoya University
March 4, 2006KEK Theory Meeting 2006
“Particle Physics Phenomenology”
![Page 2: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/2.jpg)
2
Conclusion
No New Physics Indication Yet in Rare Decays ! (except for some puzzles)
How significant is this fact ?
Many peoples expect NP at TeV.
![Page 3: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/3.jpg)
3
Search for New Physics in 3rd Gen. Quark (B) and Lepton () Decays
Hadronic Penguin decayssome puzzles ?
Radiative decays
Electroweak decays
Tauonic decays
Tau decays Lepton flavor violation
Talk Outline
, .b s d etc
, .b c etc
.etc
Figure by Dr.Hayasaka (Nagoya Univ.)
, .b s s etc
At present and future (Super-B)
![Page 4: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/4.jpg)
4
Pattern of B Decays B meson is the heaviest meson in the 3rd generation and
its decay has several patterns.– Large b quark mass– Huge top mass– Small Vcb– Non-zero Vub
B meson is an unique lab. To explore flavor mixing and CP violation. 1, , 3
- Vcb, Vub, Vtd
Many loops - box and penguin
W exchange coupled to
b u
l
W
ubV
b s
b d
d bW W
t,c,u
t,c,u
b du
u
g
b s
, Z
t
W b s
W W
t
b c
W
b
u
W
![Page 5: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/5.jpg)
5
Belle Detector7 sub-detectors for precise
– Vertexing, – Tracking, – Particle ID, – Calorimetry
![Page 6: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/6.jpg)
6
Belle Collaboration
13 countries, 57 institutes, ~400 collaborators
IHEP, ViennaITEPKanagawa U.KEKKorea U.Krakow Inst. of Nucl. Phys.Kyoto U. Kyungpook Nat’l U. EPF Lausanne Jozef Stefan Inst. / U. of Ljubljana / U. of MariborU. of Melbourne
Aomori U.BINPChiba U.Chonnam Nat’l U.U. of CincinnatiEwha Womans U.Frankfurt U.Gyeongsang Nat’l U.U. of HawaiiHiroshima Tech.IHEP, BeijingIHEP, Moscow
Nagoya U.Nara Women’s U.National Central U.Nat’l Kaoshiung Normal U.National Taiwan U.National United U.Nihon Dental CollegeNiigata U.Osaka U.Osaka City U.Panjab U.Peking U.U. of PittsburghPrinceton U.RikenSaga U.USTC
Seoul National U.Shinshu U.Sungkyunkwan U.U. of SydneyTata InstituteToho U.Tohoku U.Tohuku Gakuin U.U. of TokyoTokyo Inst. of Tech.Tokyo Metropolitan U.Tokyo U. of Agri. and Tech.Toyama Nat’l CollegeU. of TsukubaUtkal U.VPIYonsei U.
![Page 7: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/7.jpg)
7
e+ source
Ares RF cavity
Belle detectorSCC RF(HER)
ARES(LER)
The KEKB Collider e- (8.0GeV) × e+ (3.5GeV)
⇒(4S) →BB⇒Lorentz boost: = 0.425
Finite crossing angle- 11mrad ×2
Operation since 1999.
Peak luminosity 1.63 x 1034 cm-2s-1 !Integrated luminosity >560fb-1
![Page 8: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/8.jpg)
8
KEKB PerformanceRecords as of Mar.1,’06 L peak = 1.63x1034cm-2s-1
L day = 1182.5pb-1/day L int = 563.3 (Mar 1,’06)
CESR
KEKB Lint/month
Record = 27.9fb-1
![Page 9: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/9.jpg)
9
KEKB Upgrade Scenario
~1010 BB/year !!& similar number
of +-
Lpeak = 1.41034cm-2s-1
Ltot = 330fb-1 (Nov.30, 2004)
1.4x1034
330 fb-1
5x1034
~1 ab-1
5x1035
~10 ab-1
Lpeak (cm-2s-1)Lint
Crabcavities
Major upgrade ofKEKB & Belle detector(>1yr shutdown)
world records !
![Page 10: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/10.jpg)
10
Rare Decay Milestone
Observation of BK l+ l-Large CP Violation in B
Observation of Large CPV and evidence of direct CPV in B+-
Beginning of B->K0 saga
Direct CPV in B0K+
Observation of bd
FB asymmetry in BK* l+l-
Successful operation of B factories has enabled us to–Measure the B decays in different patterns.–Measure not only branching fraction, but also more details
•CP asymmetry•B+/B0 difference•Distribution (Mx in bs, AFB in BK*ll)
Successful operation of B factories has enabled us to–Measure the B decays in different patterns.–Measure not only branching fraction, but also more details
•CP asymmetry•B+/B0 difference•Distribution (Mx in bs, AFB in BK*ll)
![Page 11: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/11.jpg)
11
Direct CPV in BK Remarkable progress in the B-factory era.
CLEO w/ 2.6M BB: [PRD53,1039(1996)]
PID for high momentum K/.
386 x 106 BB
hep-ex/0507045
![Page 12: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/12.jpg)
12
K puzzle ? Ratio of branching fraction Different sign of
Acp(K+-) and Acp(K+0).0
0
( )2 1.00 0.08
( )c
B B KR
B B K
0
0 0 0
1 ( )0.79 0.08
2 ( )n
B B KR
B B K
Possible reasons; Large EW-penguin (with large phase) Large color suppressed diagram ? Or both
NP (ex. Z’) ??
No conclusion yet.
![Page 13: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/13.jpg)
13
Possible to search for NP in theoretically clean way.
Many observables;– Branching fractions– Mixing induced CPV– Direct CPV– Forward-backward asym.– Ratio of exclusive modes
bs/sl+l-
b s
t
W b s
, Z
t
W b s
W W
t
M(H+) > 350 GeV alreadyin TYPE II 2HDM
Effective Hamiltonian for bs10
*
1
4( ) ( )
2F
eff ts tb ii
GH V V C O
|C7| by BXs, Sign of C7, C9, C10 by BXsll
![Page 14: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/14.jpg)
14
bs BK*, PRD69,112001 (2004)
– 85.0MBB
0 *0
*
0.0260 0.026
*
( ) 4.01 0.21 0.17
( ) 4.25 0.31 0.24
0.012 0.044
( ) 0.015 0.044 0.012CP
Br B K
Br B K
A K
0 *0
*
0.0260 0.026
*
( ) 4.01 0.21 0.17
( ) 4.25 0.31 0.24
0.012 0.044
( ) 0.015 0.044 0.012CP
Br B K
Br B K
A K
bs(inclusive) PRD93,061803 (2004)
– 152MBB
0.30 0.11 40.31 0.07
( )
(3.55 0.32 ) 10
Br b s
0.30 0.11 40.31 0.07
( )
(3.55 0.32 ) 10
Br b s
140fb-1
E > 1.8 GeV
(M.Nakao @ CKM2005)
![Page 15: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/15.jpg)
15
bd 386M BB qq background suppression;
– Event shape– Decay vertex– Flavor tagging quality
Hep-ex/0506079v2BELLE preprint 2006-5Submitted to PRL
0.42 0.090.36 0.08( ) 0.55Br B
0 0 0.37 0.070.33 0.06( ) 1.25Br B
0 0.34 0.050.27 0.10( ) 0.56Br B
0.34 0.100.31 0.09( ( , ) ) 1.32Br B
w/ constraint from isospin relation
0.026 0.0180.025 0.0150.199 (exp.) ( .)td tsV V theo 0.026 0.0180.025 0.0150.199 (exp.) ( .)td tsV V theo
w/ Br(BK*)
![Page 16: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/16.jpg)
16
Measurement of B(BXsl+l-)
Semi-inclusive technique– Xs is reconstructed from K+ or K
s + 0-4 (at most one 0 is allowed)
– MXs < 2.0 GeV
Electron or muon pair– Mll>0.2GeV– Charmonium veto
140/fb data
Theoretical prediction by Ali et al.
Wrong flavor
MXs q2
M. Iwasaki et al. submitted to PRD, hep-ex/0503044
![Page 17: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/17.jpg)
17
C7 = -C7SM
Constraints on Ci from B(BXsl+l-)
Clean prediction for B(BXsll) with 1<q2<6GeV2 is available.– Combine Belle and Babar results– Sign of C7 flipped case with SM C9 and C10 value is unlikely.
P.Gambino, U.Haisch and M.Misiak PRL 94 061803 (2005)
BF Belle Babar WA SM C7 = -C7SM
q2>(2m)2 4.11±1.1 5.6±2.0 4.5±1.0 4.4±0.7 8.8±0.7
1<q2<6GeV2 1.5±0.6 1.8±0.9 1.60±0.5 1.57±0.16 3.30±0.25
C10NP C10
NP
C9NP
Donut : 90% CL
allowed region
C7SM
SM
![Page 18: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/18.jpg)
18
BK*ll FB Asymmetry Good electroweak probe for bs loop.
q2 distribution has different pattern depending on sign(C7).
*10 9 7( ( ) ( ) )eff
FBA C sC s r s C
FBA
2( )GeV2q
b s
, Z
t
W b s
W W
t
q0(the point w/ AFB=0) is sensitive for New PhysicsSM; q0
2=(4.2±0.6)GeV2
B
K*
l
l
B
K*
l
l
Forward Backward
T. Rizzo
M=1.5TeV
M=1 TeV
AFB w/ KK gravition exchange
![Page 19: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/19.jpg)
19
A9/A7
A1
0/A
7
AFB: Belle Summer ‘05
357fb-1 (386M BB) N(K*ll)=114+-14 (purity 44%) Unbinned M.L. fit to d2/dsd(cos)
– 8 event categories• Signal + 3 cross-feed + 4 bkg.
– Ali et al’s form factor– Fix |A7| to SM
– Float A9/A7 and A10/A7
Results;w/negative A7 (SM like)
w/positive A7
SMA9/A7
A10/A7
Sign of A9A10 is negative !
See Hep-ex/0508009 &A.Ishikawa’s talk at EPS05
![Page 20: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/20.jpg)
20
Prospect at Super-B
@ 5ab-1
C9 ~ 11%C10 ~14%q0
2/q02 ~11%
1000 pseudo experiments w/ SM input values
Expected precision
5% at 50ab-1
![Page 21: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/21.jpg)
21
Bl; leptonic decays
Proceed via W annihilation in the SM.
Branching fraction is given by
Provide information of fB|Vub|– |Vub| from BXu l fB cf) Lattice (~16%)
– Br(Bl)/md |Vub| / |Vtd|
Expected branching fraction3| | (3.67 0.47) 10ubV
(0.196 0.032)Bf GeV 5( ) (9.3 3.9) 10Br B
4 6 9~ 1 10 ( ) :~ 0.5 10 ( ) :~ 1 10 ( )Br e
![Page 22: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/22.jpg)
22
Status of Leptonic Decay Search
Results @ Summer’05
![Page 23: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/23.jpg)
23
Full Reconstruction Method
Fully reconstruct one of the B’s to tag– B production– B flavor/charge– B momentum
Υ(4S)
e (8GeV)
e+(3.5GeV)
B
B
full (0.1~0.3%)reconstructionBD etc.
Single B meson beam in offline !
Decays of interests BXu l , BK BD,
Powerful tools for B decays w/ neutrinos
![Page 24: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/24.jpg)
24
Fully Reconstructed Sample
Belle (253fb-1): 275M BB 2.5x105 B0B0 + 4.2x105 B+B-
![Page 25: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/25.jpg)
25
BStatus (Belle LP05/EPS05)
NBB (produced) = 275M NB+B- (full recon.)
= 4.0 x 105 (purity 0.55) Searched decay
modes
– Cover 81% of the decay
Event selection– Residual ECL energy
– Total net charge
etc.
, e 0, ,
0ii
Q
0.3residualE GeV
Obtained EresidualK.Ikado’s talk at EPS05hep-ex/0507034
4( ) 1.8 10 (90% )Br B CL
![Page 26: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/26.jpg)
26
Prospect
Will soon reach the SM.– 3 at ~700 fb-1
– 5 at ~2 ab-1
Expected precisionat Super-B– 13% at 5 ab-1
– 7% at 50 ab-1
B will be the next major milestone ofthe Belle mission for rare decay search !B will be the next major milestone ofthe Belle mission for rare decay search !
![Page 27: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/27.jpg)
27
Impact to Charged Higgs Br. with exchangeH
90%CL excluded regionat present
95% CL excluded regionat 5ab-1 (if Bobs = BSM)
rH
tan/mH
b
u H/W
![Page 28: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/28.jpg)
28
Charged Higgs in BD Charged Higgs modifies semileptonic decay rates.
cb
W
(the heaviest lepton) is the most sensitive.
( )tan cotb c um m
tanm cb
H
+ exchangeH exchange (SM)W
Tanaka/ Miura
![Page 29: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/29.jpg)
29
BD (MC studies)
Use fully reconstructed samples. T decay modes
Analysis cuts;– Reject events w/ p, KL– Reject D(*) contamination
– No remaining charged or 0 tracks– ECL residual energy
– Angle between two ’s
– Missing mass
0 02142 10MeV/D Dm m c
100residualE MeV
1.0 cos 0.8
2 2 21.2 ( / )B Dp p p GeV c
Signal
BG
, e , ,
![Page 30: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/30.jpg)
30
Cont’d
5ab-1 50ab-1
Mode Nsig Nbkg dB/B Nsig Nbkg dB/B
280 55012.7 7.9%
2800 550040.3 2.5%
620 3600 6200 36000
0 ( )D
0 ( )D h
Expectation at 5 / 50 ab-1 for B+ decay
5 observation possible at 1ab-1
Signal selection efficiency0
0
( )
( )
e
e
D e
D
0
0
( )
( )
D
D
10.2%2.6%
26.1%13.3%
Major background sourceMissing charged and tracks from BD(*) l X (incl. slow )
![Page 31: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/31.jpg)
31
Cont’d
(Fo
rm-fa
ctor
) ~15
%
(Fo
rm-fac
tor)
~5%Constraint
From bs
Present limit From B
![Page 32: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/32.jpg)
32
Lepton Flavor ViolationQuarks have flavor mixing.
Neutrino mixing has been found.What about charged leptons ?
e
e
? ?
(Original figure by Dr. Kuno / Osaka Univ.)
B factory is also a tau factory
![Page 33: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/33.jpg)
33
l SUSY + Seasaw Large LFV
l3ll
Br()=O(10-7~9)
2
32
4
262
( a101
) t nL
L
SUSY
BTeV
m
mr
m
3l,l • Neutral Higgs mediated decay.• Important when MSUSY >> EW scale.
462
7 322
tan 100
60
( 3 )
4 10A
L
L
B
G
m
r
m
m
eV
( ) : ( 3 ) : ( )
5 :1: 0.5
Br Br Br
( )e
0
( )e223(13)l
(m )
( )s
( )s
h
![Page 34: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/34.jpg)
34
Analysis Method
Signal extraction– Calc. Minv and DE
• DE=Erec-Ebeam
– Blinded signal region Event selection study
– Estimate backgroundusing sideband data
– Open blind and estimate signal yield• Estimate upper limits
Signal MC of Signal
region
Background
![Page 35: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/35.jpg)
35
/eat Belle
Background: /e + ISR (or beam background) Small amount of mm events in E>0
Br<3.1x10-7 at 90%C.L.
PRL 92, 171892 (2004).
Br<3.1x10-7 at 90%C.L.
PRL 92, 171892 (2004).
86.3fb-1 datae
Br<3.9x10-7 at 90%C.L.
PLB 613, 20 (2005).
Br<3.9x10-7 at 90%C.L.
PLB 613, 20 (2005).
![Page 36: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/36.jpg)
36
l Belle: 87.1fb-1, PLB 598, 103 (2004)
Br<(1.1~3.5)x10-7 at 90%C.L.
Background: low level– qq for E<0, QED( or Bhabha) for DE>0
Signal region
![Page 37: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/37.jpg)
37
B.R. Summary
Br < O(10-6) in PDG (by CLEO) Br < O(10-7) by Belle and BaBar
![Page 38: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/38.jpg)
38
Super B-factory : >10 times more data
– B.R. sensitivity: ~1/n for negligible BG case ~1/n for BG dominating modes
Future prospect
![Page 39: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/39.jpg)
39
Future prospect (2)
Possible sensitivity with Super B-factory – Red band for 5~10ab-1
SuperB-factory
![Page 40: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/40.jpg)
40
l SUSY + Seasaw Large LFV
Constraint to NP
Br()=O(10-7~9)
0tanβ=30,A =0,μ>0Gaugino mass = 200GeV
Super-BPresent Belle
2
32
4
262
( a101
) t nL
L
SUSY
BTeV
m
mr
m
3l,l • Neutral Higgs mediated decay.• Important when MSUSY >> EW scale.
462
7 322
tan 100
60
( 3 )
4 10A
L
L
B
G
m
r
m
m
eV
![Page 41: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/41.jpg)
41
Interplay between B and
J.Hisano @ Tau04Workshop, Nara,Nov, 2004.
J.Hisano, Y.ShimizuPLB565(2003)183.
![Page 42: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/42.jpg)
42
Concluding Remarks
No New Physics Indication Yet ! Need more luminosity.
This year:Crab cavity installation
Future: Super-KEKB
Stay tuned !
![Page 43: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/43.jpg)
43
Future
Let’s discuss together– Role of flavor physics– Synergy with LHC YES NO
YES 1 3
NO 2 4LHC
Flavor Phys(ex. Super-B)
NP evidence
1. We will be busy! Scenario of studies ?2. Scenario of studies ? 3. How significant is the null result at F.P. to constrain NP model.4. Where do we go ?
1. We will be busy! Scenario of studies ?2. Scenario of studies ? 3. How significant is the null result at F.P. to constrain NP model.4. Where do we go ?
![Page 44: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/44.jpg)
44
CERN Flavor WS
Nov. 7-10, 2005 Feb. 6-8, 2006 May.15-17, 2006 Final report at
2006/end or 2007/beg.
Discuss synergy between Flavor Physics (B/C/K/t/m etc.) and LHC.
Bench mark model & parameters for studies.
Let’s discuss together !
![Page 45: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/45.jpg)
45
Backup
![Page 46: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/46.jpg)
46
Radiative Decays
Inclusive Br(bs) |C7|, SF for |Vub| BK* isospin asymmetry (+-)sign of C7
Mixing induced CPV Direct CPV in BXs BXd
Summary by M.Nakao1st Super-B workshopat Hawaii
![Page 47: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/47.jpg)
47
B0KS0 tCPV: Belle Summer ‘05
386MBB M(Ks0) < 1.8GeV/c2
– NP effect is independent of the resonance structure. Two M(Ks0) regions(MR1:0.8-1.0GeV/c2 / MR2: <1.8GeV/c2) 70+-11 (45+-11) events in MR1(2).
Atwood, Gershon, Hazumi, Soni, PRD71, 076003 (2005)
ResultS= +0.08 ±0.41 ±0.10 A= +0.12±0.27±0.10
Good tag (0.5<r<1.0)
0.0050.0110.051 / 0.038Acpdir(BXs)
0.040.140.41 / 0.10Acpmix(BK*K*Ks0)
50ab-15ab-1Present Belle (stat./syst.)
![Page 48: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/48.jpg)
48
Acp(BXs) vs SUSY models
mSUGURAtan=30
U(2)tan=30
SU(5)+R
tan=30degenerate
SU(5)+R
tan=30non-degenerate
( )gm GeV
mSUGURAtan=30
U(2)tan=30
SU(5)+R
tan=30degenerate
SU(5)+R
tan=30non-degenerate
( )gm GeV
Mixing CPVDirect CPV
Acp
dir
Acp
mix
5ab-1 50ab-1
T. Goto, Y.Okada, Y.Shimizu,T.Shindou, M.Tanakahep-ph/0306093, also in SuperKEKB LoI
![Page 49: New Physics in Rare Decays at Belle](https://reader035.fdocuments.in/reader035/viewer/2022062409/56814931550346895db6735a/html5/thumbnails/49.jpg)
49
Constraint to Charged Higgs
Once branching fraction is measured, we can constrain R.
tanW
H
MR
M
Form factor error
M.Tanaka, Z.Phys. C67 (1995) 321
11R at 5ab-1 can be determined experimentallyby B semiletonic decays