sin2 1 /sin2 via penguin processes beauty 2006 sep.25-29, univ. of oxford yutaka ushiroda (kek)
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sin21/sin2 via penguin processes
Beauty 2006Sep.25-29, Univ. of Oxford
Yutaka Ushiroda (KEK)
Introduction
_
d
b_ c
c
sd
_wB0J/
K0 1sin 2
0
fS
A C
treeb ccs
d
b_ _
sssd
_gtB0
K0
, ’...w
1sin 2
0
efffS
A
penguinb sqq
Extra CPV phase from New Physics1 1 1sin 2 sin 2 sin 2 0eff
Time-Dependent CP asymmetry in B0 decays
SM Contamination
+1KsKsKs
1Ks
P’
T
P
T’
Ks
Ks
f0Ks
Ks~+1K+KKs
CPmode
T’Pb
dg
t
d
ss
s
W
2P’
b
dg
t
d
ds
d
W
2T
W b
d
d
uu
s4 W
b
dd
u
u
ss
s
4
Tree (Vub) contamination
Long distance effect
1sin 2 0 within the SM Need to know the size to claim NP
4Im 0 at tsV O
2
2
2 4 3
2 5 2 4 2 61 12 2 8
2 3 5 2 4 12 2
1 2 8
1 2
1 1
A
A
A i
V A i A O
A i i A A i
u-quark penguin~Vub
* Vus
b
dg
d
ss
s
W
u
Positive sin21
Three theoretically-clean modes
Theoretical estimates of sin21/
Short distance effectQCDF:Beneke, PLB 620, 143 (2005)Cheng, Chua, Yang, PRD 73, 014017 (2006)pQCD:Mishima, Sanda, PRD 72, 114005 (2005)SCET:Williamson, Zupan, PRD 74, 014003 (2006)
Long distance effect (is small)Cheng, Chua, Soni, PRD 72, 014006 (2005)
sin21/
QCDF
Reviewed in hep-ph/0605301 (talk by Chua in FPCP06)
Lazzaro’s talkat ICHEP06
Status before summer
Belle BaBar
K0
KKKS KS
KLKS Time-dependent
Dalitz analysisK+KKS
K+KKS00
K+KKL
KKKS
KKKL
f0K0 f0KS
KKK0 KKexcl. KS
’K0
’(KS ’(KS
’(3KS
’(KS ’(KS
’(3KS
’(KL ’(KL ’(3KL
3KSKS
KSKS
KSKS
KS
KS0 KS
KS KS
Reconstruction modes347MBB535MBB
KSKS
KSKS
Belle BaBar
K0
KKKS KS
KLKS Time-dependent
Dalitz analysisK+KKS
K+KKS00
K+KKL
KKKS
KKKL
f0K0 f0KS
KKK0 KKexcl. KS
’K0
’(KS ’(KS
’(3KS
’(KS ’(KS
’(3KS
’(KL ’(KL ’(3KL
3KSKS
KSKS
KSKS
KS
KS0 KS
KS KS
Reconstruction modes347MBB535MBB
KSKS
KSKS
1516 65 KKK0signal
1516 65 KKK0signal
Obtain CP parameters for 2-body and 3-body modes simultaneously
347MBB
hep-ex/0607112
BKKK0 Time-dependent Dalitz
K+KKS
K+KKS00
K+KKL
Intermediate resonances ( (1020)K0, f0(980)K0, X0(1550)K0, c0K0, DK, DsK) a
nd NR
K0: sin2eff = +0.12 0.31(stat) 0.10 (syst)K0: sin2eff = +0.12 0.31(stat) 0.10 (syst)
measurement (not sin2)
excludeat 4.6
0 tagB0 tagB
whole DPS
K K K
CPA 0.034 0.079 0.025
0.361 0.079 0.037eff
Fit to low KK mass region (<1.1GeV)
0CP
0
A 0.18 0.20 0.10
0.06 0.16 0.05eff
K
K
0CP 0
00
A 0.45 0.28 0.10
0.18 0.19 0.04eff
f K
f K
First in f0KK
347MBB
hep-ex/0607112
+0.070.50 0.250.04
Cf. BaBar 2005
B0 K0
B0 mass
B0 momentum
(bkg subtracted)
KK, KS
KK, KS
KSKL, KS
114 17 KL signal
114 17 KL signal
2461840922730721 KS signal
2461840922730721 KS signalNew mode
hep-ex/0608039hep-ex/0608039
535MBB
KK
TCPV in B0 K0
“sin21” = 0.50 0.21(stat) 0.06(syst) A = 0.07 0.15(stat) 0.05(syst)
“sin21” = 0.50 0.21(stat) 0.06(syst) A = 0.07 0.15(stat) 0.05(syst)
KS and KL combined background subtracted good tags t –t for KL
t distribution and asymmetry
Consistent with the SM (~1lower) Consistent with Belle 2005
(Belle2005: “sin21” = +0.44
Consistent with the SM (~1lower) Consistent with Belle 2005
(Belle2005: “sin21” = +0.44
unbinned fitSM
535MBB
hep-ex/0608039hep-ex/0608039
TCPV in B0 f0KS
“sin21” = 0.23(stat) 0.11(syst) A = 0.15(stat) 0.07(syst)
“sin21” = 0.23(stat) 0.11(syst) A = 0.15(stat) 0.07(syst)
377 25 f0KS signal377 25 f0KS signal
Raw symmetryB0 mass
good tags mass
535MBB
hep-ex/0609006hep-ex/0609006
f0
TCPV in B0 KKKS
840 34 KS signal
840 34 KS signal
Raw symmetryB0 mass
good tags
“sin21” = 0.15(stat) 0.03(syst) (CP-even) A = 0.10(stat) 0.05(syst)
“sin21” = 0.15(stat) 0.03(syst) (CP-even) A = 0.10(stat) 0.05(syst)
+0.210.13
535MBB
hep-ex/0609006hep-ex/0609006
0.93 0.09 0.05f mixture of CP even and odd states
(2005)
Belle BaBar
K0
KKKS KS
KLKS Time-dependent
Dalitz analysisK+KKS
K+KKS00
K+KKL
KKKS
KKKL
f0K0 f0KS
KKK0 KKexcl. KS
’K0
’(KS ’(KS
’(3KS
’(KS ’(KS
’(3KS
’(KL ’(KL ’(3KL
3KSKS
KSKS
KSKS
KS
KS0 KS
KS KS
Reconstruction modes347MBB535MBB
KSKS
KSKS
B0 'K 0
(bkg subtracted)
B0 massB0 momentum
535MBB
hep-ex/0608039hep-ex/0608039
’ Ks() 794 36
(2) Ks() 363 21
(3) Ks() 100 11
Ks() 103 15
() Ks() 62 9
Total 1421 46
’() KL 392 37
() KL 62 13
Total 454 39
TCPV in B0 'K 0
“sin21” = 0.64 0.10(stat) 0.04(syst) A = 0.01 0.07(stat) 0.05(syst)
“sin21” = 0.64 0.10(stat) 0.04(syst) A = 0.01 0.07(stat) 0.05(syst)
Consistent with the SM Consistent with Belle 2005
(Belle 2005: “sin21” = +0.62
First observation of TCPV (5.6in a single b s mode
Consistent with the SM Consistent with Belle 2005
(Belle 2005: “sin21” = +0.62
First observation of TCPV (5.6in a single b s mode
t distribution and asymmetry
'KS and 'KL combined background subtracted good tags t –t for 'KL
535MBB
hep-ex/0608039hep-ex/0608039
B0 'K 0
347MBB
hep-ex/0607100
936 41 'KS signal
936 41 'KS signal
168 21 'KL signal
168 21 'KL signal
TCPV in B0 'K 0
Cf. BaBar 2005: “sin2” = +0.36 0.13 0.03
“sin2” = 0.55 0.11(stat) 0.02(syst) A = 0.15 0.07(stat) 0.03(syst) “sin2” = 0.55 0.11(stat) 0.02(syst) A = 0.15 0.07(stat) 0.03(syst)
“sin2” 4.9 from zero.
347MBB
hep-ex/0607100
SK LK
0B0B
0B
0B
Belle BaBar
K0
KKKS KS
KLKS Time-dependent
Dalitz analysisK+KKS
K+KKS00
K+KKL
KKKS
KKKL
f0K0 f0KS
KKK0 KKexcl. KS
’K0
’(KS ’(KS
’(3KS
’(KS ’(KS
’(3KS
’(KL ’(KL ’(3KL
3KSKS
KSKS
KSKS
KS
KS0 KS
KS KS
Reconstruction modes347MBB535MBB
KSKS
KSKS
Vertex Reconstruction with KS
good tag
Ks track
IP profileBCP vertex
J/KS with the KS Vertexing
Raw
asy
mm
etr
y
Extrapolate KS track to the Interaction PointVertex reconstruction efficiency with a single KS : 30 to 45% (Belle), 60% (BaBar KS)
Events without the vertex can still be used for A-term measurement.
Validity confirmed with J/KS as a control sample.
1sin2 0.68 0.06
TCPV in B0 KSKSKS
“sin21” = 0.30 0.32(stat) 0.08(syst) A = 0.31 0.20(stat) 0.07(syst)
“sin21” = 0.30 0.32(stat) 0.08(syst) A = 0.31 0.20(stat) 0.07(syst)
B0 masst distribution and asymmetry
background subtracted good tags
535MBB
hep-ex/0608039hep-ex/0608039
15714 KS
KS
KS
289 KS
KS
KS00
185 17 total
15714 KS
KS
KS
289 KS
KS
KS00
185 17 total
11612 KS
KS
KS
6012 KS
KS
KS00
176 17 total
11612 KS
KS
KS
6012 KS
KS
KS00
176 17 total
mB & mmiss
instead ofmES & E
“sin2” = 0.66 0.26(stat) 0.08(syst) A = 0.14 0.22(stat) 0.05(syst) “sin2” = 0.66 0.26(stat) 0.08(syst) A = 0.14 0.22(stat) 0.05(syst)
TCPV in B0 KSKSKS
t distribution and asymmetry
347MBB
hep-ex/0607108
SS SK K K
00
SS SK K K
TCPV in B0 KS
“sin2” = 0.33 0.26(stat) 0.04(syst) A = 0.20 0.16(stat) 0.03(syst) “sin2” = 0.33 0.26(stat) 0.04(syst) A = 0.20 0.16(stat) 0.03(syst)
425 28
0KS signal
425 28
0KS signal
347MBB
hep-ex/0607096
missing mass & mB
TCPV in B0 KS
“sin21” = 0.35(stat) 0.08(syst) A = 0.14(stat) 0.05(syst)
“sin21” = 0.35(stat) 0.08(syst) A = 0.14(stat) 0.05(syst)
515 32
0KS signal
515 32
0KS signal
Raw symmetryB0 mass
good tags
535MBB
hep-ex/0609006hep-ex/0609006
TCPV in B0 KS
“sin21” = 0.46(stat) 0.07(syst) A = 0.29(stat) 0.06(syst)
“sin21” = 0.46(stat) 0.07(syst) A = 0.29(stat) 0.06(syst)
118 18 KS signal
118 18 KS signal
B0 mass
Raw symmetry
good tags
535MBB
hep-ex/0609006hep-ex/0609006
TCPV in B0 KS
“sin2” = 0.62 (stat) 0.02(syst) A = 0.43 (stat) 0.03(syst) “sin2” = 0.62 (stat) 0.02(syst) A = 0.43 (stat) 0.03(syst) +0.23
0.25
+0.250.30
142 17 KS signal142 17 KS signal
347MBB
hep-ex/0607101
0B
0B
Summary
Smaller than bccs in all of 9 modes
Smaller than bccs in all of 9 modesTheory tends to predict SM contamination in positive side
Naïve average of all b s modes
sin2eff = 0.52 ± 0.052.6 deviation
Naïve average of all b s modes
sin2eff = 0.52 ± 0.052.6 deviation
More statistics crucial for mode-by-mode studies
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