Measurements of the branching fraction and time-dependent CP asymmetries of $B^0 \to J/\psi \pi^0$ decays

We present measurements of the branching fraction and time-dependent CP asymmetries in B0 -> JPsi pi0 decays based on (231.8 +/- 2.6) x 10**6 asymmetries Y(4S) -> BBbar decays collected with the BaBar detector at the SLAC PEP-II asymmetric-energy B factory. We obtain a branching fraction B(B0 -> JPsi pi0) = (1.94 +/- 0.22 (stat.) +/- 0.17 (syst.)) x 10**-5. We also measure the CP asymmetry parameters C = -0.21 +/- 0.26 (stat.) +/- 0.06 (syst.) and S = -0.68 +/- 0.30 (stat.) +/- 0.04 (syst.).

Note:

Submitted to PRD-RC

11.30.Er
12.15.Hh
13.25.Hw
electron positron: colliding beams
electron positron: annihilation
Upsilon(10570): electroproduction
B: pair production
B0: hadronic decay
J/psi(3100)
pi0

References(22)

Figures(4)

Measurement of the CP-violating asymmetry amplitude $\sin 2\beta$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 89 (2002) 201802
•
e-Print:
- hep-ex/0207042
•
DOI:
- 10.1103/PhysRevLett.89.201802

An Improved measurement of mixing induced CP violation in the neutral B meson system

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 66 (2002) 071102
•
e-Print:
- hep-ex/0208025
•
DOI:
- 10.1103/PhysRevD.66.071102

Unitary Symmetry and Leptonic Decays

Nicola Cabibbo
(
- CERN
)

- Phys.Rev.Lett. 10 (1963) 531-533,
- Also in *Bologna 1984, Proceedings, Fifty years of weak-interaction physics* 648-649
•
DOI:
- 10.1103/PhysRevLett.10.531

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

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

CP asymmetries in B decays with new physics in decay amplitudes

Yuval Grossman
(
- SLAC
)
,
Mihir P. Worah
(
- SLAC
)

- Phys.Lett.B 395 (1997) 241-249
•
e-Print:
- hep-ph/9612269
•
DOI:
- 10.1016/S0370-2693(97)00068-3

The Effect of penguins in the B(d) ---> J / psi K0 CP asymmetry

M. Ciuchini
(
- Rome III U. and
- INFN, Rome3
)
,
M. Pierini
(
- Wisconsin U., Madison
)
,
L. Silvestrini
(
- Munich, Tech. U. and
- Rome U. and
- INFN, Rome
)

- Phys.Rev.Lett. 95 (2005) 221804
•
e-Print:
- hep-ph/0507290
•
DOI:
- 10.1103/PhysRevLett.95.221804

Measurement of branching fractions for exclusive $B$ decays to charmonium final states

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 65 (2002) 032001
•
e-Print:
- hep-ex/0107025
•
DOI:
- 10.1103/PhysRevD.65.032001

Study of time-dependent CP asymmetry in neutral $B$ decays to $J/\psi \pi^0$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 91 (2003) 061802
•
e-Print:
- hep-ex/0303018
•
DOI:
- 10.1103/PhysRevLett.91.061802

Measurement of branching fractions and charge asymmetries for two-body B meson decays with charmonium

Belle

Collaboration

•

K. Abe

et al.

- Phys.Rev.D 67 (2003) 032003
•
e-Print:
- hep-ex/0211047
•
DOI:
- 10.1103/PhysRevD.67.032003

Study of time-dependent CP violation in B0 ---> J/psi pi0 decays

Belle

Collaboration

•

S.U. Kataoka
(
- Nara Women's U.
)

et al.

- Phys.Rev.Lett. 93 (2004) 261801
•
e-Print:
- hep-ex/0408105
•
DOI:
- 10.1103/PhysRevLett.93.261801

The BaBar detector

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 479 (2002) 1-116
•
e-Print:
- hep-ex/0105044
•
DOI:
- 10.1016/S0168-9002(01)02012-5

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

The use of multiple measurements in taxonomic problems

Ronald Aylmer Fisher

- Annals Eugen. 7 (1936) 179-188
•
DOI:
- 10.1111/j.1469-1809.1936.tb02137.x

Improved measurement of CP asymmetries in $B^0 \to (c \bar{c}) K^{(*)0}$ decays

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 94 (2005) 161803
•
e-Print:
- hep-ex/0408127
•
DOI:
- 10.1103/PhysRevLett.94.161803

Physics with the Crystal Ball Detector

Elliott D. Bloom
(
- SLAC
)
,
C. Peck
(
- Caltech
)

- Ann.Rev.Nucl.Part.Sci. 33 (1983) 143-197,
- In *Cahn, R.n. ( Ed.): E+ E- Annihilation: New Quarks and Leptons*, 333-387. ( Ann. Rev. Nucl. Part. Sci. 33 ( 1983) 143-197) and Caltech Pasadena - CALT-68-0989 (REC.AUG.83) 79p
•
DOI:
- 10.1146/annurev.ns.33.120183.001043