Observation of B decays to two kaons - INSPIRE

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Observation of B decays to two kaons

Belle

Collaboration

Aug, 2006

10 pages

Published in:

Phys.Rev.Lett. 98 (2007) 181804

e-Print:

hep-ex/0608049 [hep-ex]

DOI:

10.1103/PhysRevLett.98.181804

PDG:

{{\mathit B}^{+}}

\rightarrow

{{\mathit K}^{+}}{{\overline{\mathit K}}^{0}}

Report number:

BELLE-CONF-0633

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

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Abstract:

Using 449 million BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider, we observe clear signals for B^+-> \bar{K}^0 K^+ and B^0-> \bar{K}^0 K^0 decays with 5.3 sigma and 6.0 sigma significance, respectively. We measure the branching fractions Br(B^+-> \bar{K}^0 K^+ = (1.22^{+0.32+0.13}_{-0.28-0.16})x10^{-6} and Br(B^0-> \bar{K}^0 K^0) = (0.87^{+0.25}_{-0.20} +- 0.09)x10^{-6}, and partial-rate asymmetries A_{CP}(B^+-> \bar{K}^0 K^+) = 0.13^{+0.23}_{-0.24}+- 0.02 and A_{CP}(B^0-> \bar{K}^0 K^0) = -0.58^{+0.73}_{-0.66}+- 0.04. From a simultaneous fit we also obtain Br(B^+-> K^0\pi^+)= (22.8^{+0.8}_{-0.7} +- 1.3)x 10^{-6} and A_{CP}(B^+-> K^0 \pi^+) = 0.03 +- 0.03 +- 0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B^0-> K^+ K^- decays, and for this branching fraction we set an upper limit of 4.1x10^{-7} at the 90% confidence level.

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References(33)

Figures(0)

Improved measurements of branching fractions for B ---> K pi, pi pi and K anti-K decays

Belle

Collaboration

•

Y. Chao
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.D 69 (2004) 111102
•
e-Print:
- hep-ex/0311061
•
DOI:
- 10.1103/PhysRevD.69.111102

Measurements of branching fractions and CP-violating asymmetries in $B^0 \to \pi^+ \pi^-,\, K^+ \pi^-,\, K^+ K^-$ decays

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 89 (2002) 281802
•
e-Print:
- hep-ex/0207055
•
DOI:
- 10.1103/PhysRevLett.89.281802

Measurements of branching fractions and CP-violating asymmetries in $B$ meson decays to charmless two-body states containing a $K^0$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 92 (2004) 201802
•
e-Print:
- hep-ex/0312055
•
DOI:
- 10.1103/PhysRevLett.92.201802

Evidence for $B^0 \to \pi^0 \pi^0$

Belle

Collaboration

•

S.H. Lee
(
- DMRC, Seoul
)

et al.

- Phys.Rev.Lett. 91 (2003) 261801
•
e-Print:
- hep-ex/0308040
•
DOI:
- 10.1103/PhysRevLett.91.261801

Observation of $B^0 \to \pi^0 \pi^0$

Belle

Collaboration

•

Y. Chao
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.Lett. 94 (2005) 181803
•
e-Print:
- hep-ex/0408101
•
DOI:
- 10.1103/PhysRevLett.94.181803

Observation of the decay $B^0 \to \pi^0 \pi^0$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 91 (2003) 241801
•
e-Print:
- hep-ex/0308012
•
DOI:
- 10.1103/PhysRevLett.91.241801

Branching fractions and CP asymmetries in $B^0 \to \pi^0 \pi^0$ , $B^+ \to \pi^+ \pi^0$ and $B^+ \to K^+ \pi^0$ decays and isospin analysis of the $B \to \pi \pi$ system

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 94 (2005) 181802
•
e-Print:
- hep-ex/0412037
•
DOI:
- 10.1103/PhysRevLett.94.181802

Evidence for direct CP violation in B0 ---> K+ pi- decays

Belle

Collaboration

•

Y. Chao
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.Lett. 93 (2004) 191802
•
e-Print:
- hep-ex/0408100
•
DOI:
- 10.1103/PhysRevLett.93.191802

Improved measurements of direct CP violation in B ---> K+ pi-, K+ pi0 and pi+ pi0 decays

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

e-Print:
- hep-ex/0507045

Observation of direct CP violation in $B^0 \to K^+ \pi^-$ decays

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 93 (2004) 131801
•
e-Print:
- hep-ex/0407057
•
DOI:
- 10.1103/PhysRevLett.93.131801

Evidence for $B^+ \to \bar{K}^0 K^+$ and $B^0 \to K^0 \bar{K}^0$ , and measurement of the branching fraction and search for direct CP violation in $B^+ \to K^0 \pi^+$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 95 (2005) 221801
•
e-Print:
- hep-ex/0507023
•
DOI:
- 10.1103/PhysRevLett.95.221801

Measurements of B decays to two kaons

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 95 (2005) 231802
•
e-Print:
- hep-ex/0506080
•
DOI:
- 10.1103/PhysRevLett.95.231802

CP asymmetries in pure penguin induced B decays

Jean-Marc Gerard
(
- Louvain U.
)
,
Wei-Shu Hou
(
- PSI, Villigen
)

- Phys.Lett.B 253 (1991) 478-482
•
DOI:
- 10.1016/0370-2693(91)91755-K

Mixing induced CP violation in the decay B(d) ---> K0 anti-K0 within the standard model

Robert Fleischer
(
- Munich, Tech. U.
)

- Phys.Lett.B 341 (1994) 205-212
•
e-Print:
- hep-ph/9409290
•
DOI:
- 10.1016/0370-2693(94)90311-5

Penguin topologies, rescattering effects and penguin hunting with B(u,d) ---> K anti-K and B+- ---> pi+- K

Andrzej J. Buras
(
- Munich, Tech. U.
)
,
Robert Fleischer
(
- CERN
)
,
Thomas Mannel
(
- Karlsruhe U., TTP
)

- Nucl.Phys.B 533 (1998) 3-24
•
e-Print:
- hep-ph/9711262
•
DOI:
- 10.1016/S0550-3213(98)00506-9

Indication for large rescatterings in charmless rare B decays

- Mod.Phys.Lett.A 18 (2003) 1763-1772
•
e-Print:
- hep-ph/0210002
•
DOI:
- 10.1142/S0217732303011551

CP violation in the decays B ---> K anti-K in the presence of D anti-D <---> K anti-K mixing

S. Barshay
(
- Aachen, Tech. Hochsch.
)
,
L.M. Sehgal
(
- Aachen, Tech. Hochsch.
)
,
J. van Leusen
(
- Aachen, Tech. Hochsch.
)

- Phys.Lett.B 596 (2004) 240-246
•
e-Print:
- hep-ph/0406011
•
DOI:
- 10.1016/j.physletb.2004.06.087

Improved Evidence for Direct CP Violation in B0 --> pi+ pi- Decays and Model-Independent Constraints on phi(2)

Belle

Collaboration

•

Kazuo Abe

et al.

- Phys.Rev.Lett. 95 (2005) 101801
•
e-Print:
- hep-ex/0502035
•
DOI:
- 10.1103/PhysRevLett.95.101801

Improved measurements of CP-violating asymmetries in $B^0 \to \pi^{+} \pi^{-}$ decays

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

e-Print:
- hep-ex/0408089

Overview of the KEKB accelerators

S. Kurokawa
(
- KEK, Tsukuba
)
,
Eiji Kikutani
(
- KEK, Tsukuba
)

- Nucl.Instrum.Meth.A 499 (2003) 1-7
•
DOI:
- 10.1016/S0168-9002(02)01771-0

The Belle Detector

Belle

Collaboration

•

A. Abashian

et al.

- Nucl.Instrum.Meth.A 479 (2002) 117-232
•
DOI:
- 10.1016/S0168-9002(01)02013-7

Belle silicon vertex detectors

Y. Ushiroda
(
- KEK, Tsukuba
)

- Nucl.Instrum.Meth.A 511 (2003) 6-10
•
DOI:
- 10.1016/S0168-9002(03)01739-X

Observables for the Analysis of Event Shapes in e+ e- Annihilation and Other Processes

Geoffrey C. Fox
(
- Caltech
)
,
Stephen Wolfram
(
- Caltech
)

- Phys.Rev.Lett. 41 (1978) 1581
•
DOI:
- 10.1103/PhysRevLett.41.1581

Review of particle physics. Particle Data Group

S. Eidelman
(
- Novosibirsk, IYF
)
,
K.G. Hayes
(
- Hillsdale Coll.
)
,
K.A. Olive
(
- Minnesota U.
)
,
M. Aguilar-Benitez
(
- Madrid, CIEMAT
)
,
Claude Amsler
(
- Zurich U.
)

et al.

- Phys.Lett.B 592 (2004) 1-4, 1
•
DOI:
- 10.1016/j.physletb.2004.06.001

Neutral B flavor tagging for the measurement of mixing induced CP violation at Belle

Belle

Collaboration

•

H. Kakuno
(
- Tokyo Inst. Tech.
)

et al.

- Nucl.Instrum.Meth.A 533 (2004) 516-531
•
e-Print:
- hep-ex/0403022
•
DOI:
- 10.1016/j.nima.2004.06.159

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