Study of CP violating asymmetries in B0 ---> pi+ pi- decays - INSPIRE

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Study of CP violating asymmetries in B0 ---> pi+ pi- decays

Belle

Collaboration

Apr, 2002

10 pages

Published in:

Phys.Rev.Lett. 89 (2002) 071801

e-Print:

hep-ex/0204002 [hep-ex]

DOI:

10.1103/PhysRevLett.89.071801

PDG:

\mathit C_{{{\mathit \pi}} {{\mathit \pi}} }

{{\mathit B}^{0}}

\rightarrow

{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}

Report number:

KEK-PREPRINT-2002-6,
BELLE-PREPRINT-2002-08

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search72 citations

Citations per year

Abstract: (arXiv)

We present a measurement of CP-violating asymmetries in B0 -> pi+pi- decays based on a 41.8 fb-1 data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We fully reconstruct one neutral B meson as a B0 -> pi+pi- CP eigenstate and identify the flavor of the accompanying B meson from its decay products. From the asymmetry in the distribution of the time intervals between the two B meson decay points, we obtain the CP-violating asymmetry parameters Spipi = -1.21 +0.38/-0.27(stat) +0.16/-0.13(syst) and Apipi = +0.94 +0.25/-0.31(stat) +/- 0.09(syst).

electron positron: colliding beams
electron positron: annihilation
Upsilon(10570): electroproduction
B: pair production
B0: hadronic decay
pi: pair production
CP: violation
particle identification: flavor
BELLE
experimental results

References(21)

Figures(0)

CP Violation in the Renormalizable Theory of Weak Interaction

Makoto Kobayashi
(
- Kyoto U.
)
,
Toshihide Maskawa
(
- Kyoto U.
)

- Prog.Theor.Phys. 49 (1973) 652-657,
- Also in *Lichtenberg, D. B. (Ed.), Rosen, S. P. (Ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 218-223.
•
DOI:
- 10.1143/PTP.49.652

Observation of large CP violation in the neutral $B$ meson system

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 87 (2001) 091802
•
e-Print:
- hep-ex/0107061
•
DOI:
- 10.1103/PhysRevLett.87.091802

Observation of mixing induced CP violation in the neutral $B$ meson system

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 66 (2002) 032007
•
e-Print:
- hep-ex/0202027
•
DOI:
- 10.1103/PhysRevD.66.032007

Observation of CP violation in the $B^0$ meson system

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPTH
)

et al.

- Phys.Rev.Lett. 87 (2001) 091801
•
e-Print:
- hep-ex/0107013
•
DOI:
- 10.1103/PhysRevLett.87.091801

A study of time dependent CP-violating asymmetries and flavor oscillations in neutral $B$ decays at the $\Upsilon(4S)$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 66 (2002) 032003
•
e-Print:
- hep-ex/0201020
•
DOI:
- 10.1103/PhysRevD.66.032003

CP Violation in Cascade Decays of B Mesons

Ashton B. Carter
(
- Rockefeller U.
)
,
A.I. Sanda
(
- Rockefeller U.
)

- Phys.Rev.Lett. 45 (1980) 952
•
DOI:
- 10.1103/PhysRevLett.45.952

CP Violation in B Meson Decays

Ashton B. Carter
(
- Rockefeller U.
)
,
A.I. Sanda
(
- Rockefeller U.
)

- Phys.Rev.D 23 (1981) 1567
•
DOI:
- 10.1103/PhysRevD.23.1567

Notes on the Observability of CP Violations in B Decays

Ikaros I.Y. Bigi
(
- Aachen, Tech. Hochsch.
)
,
A.I. Sanda
(
- Rockefeller U.
)

- Nucl.Phys.B 193 (1981) 85-108
•
DOI:
- 10.1016/0550-3213(81)90519-8

QCD factorization in B ---> pi K, pi pi decays and extraction of Wolfenstein parameters

M. Beneke
(
- Aachen, Tech. Hochsch.
)
,
G. Buchalla
(
- CERN
)
,
M. Neubert
(
- Cornell U., LNS
)
,
Christopher T. Sachrajda
(
- Southampton U.
)

- Nucl.Phys.B 606 (2001) 245-321
•
e-Print:
- hep-ph/0104110
•
DOI:
- 10.1016/S0550-3213(01)00251-6

Penguin enhancement and $B \to K \pi$ decays in perturbative QCD

Y.Y. Keum
(
- Taiwan, Inst. Phys. and
- KEK, Tsukuba
)
,
Hsiang-Nan Li
(
- KEK, Tsukuba and
- Taiwan, Natl. Cheng Kung U.
)
,
A.I. Sanda
(
- Nagoya U.
)

- Phys.Rev.D 63 (2001) 054008
•
e-Print:
- hep-ph/0004173
•
DOI:
- 10.1103/PhysRevD.63.054008

Charming penguins strike back

Marco Ciuchini
(
- Rome III U. and
- INFN, Rome3
)
,
E. Franco
(
- Rome U. and
- INFN, Rome
)
,
G. Martinelli
(
- Rome U. and
- INFN, Rome
)
,
M. Pierini
(
- Rome U. and
- INFN, Rome
)
,
L. Silvestrini
(
- Rome U. and
- INFN, Rome
)

- Phys.Lett.B 515 (2001) 33-41
•
e-Print:
- hep-ph/0104126
•
DOI:
- 10.1016/S0370-2693(01)00700-6

Implications of CP asymmetry limits for B ---> K pi and B ---> pi pi

Michael Gronau
(
- Technion
)
,
Jonathan L. Rosner
(
- Chicago U., EFI and
- Chicago U.
)

- Phys.Rev.D 65 (2002) 013004,
- Phys.Rev.D 65 (2002) 079901 (erratum)
•
e-Print:
- hep-ph/0109238
•
DOI:
- 10.1103/PhysRevD.65.013004

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

Measurement of branching fractions for B ---> pi pi, K pi and K K decays

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 87 (2001) 101801
•
e-Print:
- hep-ex/0104030
•
DOI:
- 10.1103/PhysRevLett.87.101801

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

A Measurement of the branching fraction for the inclusive B ---> X(s) gamma decays with BELLE

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Lett.B 511 (2001) 151-158
•
e-Print:
- hep-ex/0103042
•
DOI:
- 10.1016/S0370-2693(01)00626-8

Review of particle physics. Particle Data Group

et al.

- Eur.Phys.J.C 15 (2000) 1-878

Study of CP-violating asymmetries in $B^0 \to \pi^+ \pi^-,\, K^+ \pi^-$ decays

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 65 (2002) 051502
•
e-Print:
- hep-ex/0110062
•
DOI:
- 10.1103/PhysRevD.65.051502

A Unified approach to the classical statistical analysis of small signals

Gary J. Feldman
(
- Harvard U.
)
,
Robert D. Cousins
(
- UCLA
)

- Phys.Rev.D 57 (1998) 3873-3889
•
e-Print:
- physics/9711021
•
DOI:
- 10.1103/PhysRevD.57.3873

Isospin analysis of CP asymmetries in B decays

Michael Gronau
(
- Technion and
- DESY
)
,
David London
(
- Montreal U.
)

- Phys.Rev.Lett. 65 (1990) 3381-3384
•
DOI:
- 10.1103/PhysRevLett.65.3381

Improving bounds on penguin pollution in $B \to \pi \pi$

- Phys.Lett.B 514 (2001) 315-320
•
e-Print:
- hep-ph/0105308
•
DOI:
- 10.1016/S0370-2693(01)00818-8