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