Study of the CP asymmetry of $B^0 \to J/\psi K^0_{S}$ decays in ALEPH - INSPIRE

DataBETA

Study of the CP asymmetry of $B^0 \to J/\psi K^0_{S}$ decays in ALEPH

ALEPH

Collaboration

Sep, 2000

21 pages

Published in:

Phys.Lett.B 492 (2000) 259-274

e-Print:

hep-ex/0009058 [hep-ex]

DOI:

10.1016/S0370-2693(00)01091-1

PDG: sin

(2\beta )

Report number:

CERN-EP-2000-119

Experiments:

CERN-LEP-ALEPH

View in:

pdflinksdatasets

reference search121 citations

Citations per year

Abstract: (Elsevier)

The decay B 0 → J /ψ K 0 S is reconstructed with J/ ψ →e + e − or μ + μ − and K 0 S → π + π − . From the full ALEPH dataset at LEP1 of about 4 million hadronic Z decays, 23 candidates are selected with an estimated purity of 71%. They are used to measure the CP asymmetry of this decay, given by sin2 β in the Standard Model, with the result sin 2β=0.84 +0.82 −1.04 ±0.16 . This is combined with existing measurements from other experiments, and increases the confidence level that CP violation has been observed in this channel to 98%.

Note:

17 pages,8 figures Report-no: CERN-EP/2000-119

electron positron: colliding beams
electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
bottom: pair production
B0: hadronic decay
J/psi(3100): leptonic decay
K0(S): hadronic decay
CP: violation
CKM matrix: unitarity

References(22)

Figures(9)

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

A Study of $B$ meson oscillations using hadronic $Z^0$ decays containing leptons

OPAL

Collaboration

•

K. Ackerstaff

et al.

- Z.Phys.C 76 (1997) 401-415
•
e-Print:
- hep-ex/9707009
•
DOI:
- 10.1007/s002880050564

Measurement of the $B^{+}$ and $B^0$ lifetimes and search for CP( $T$ ) violation using reconstructed secondary vertices

OPAL

Collaboration

•

G. Abbiendi

et al.

- Eur.Phys.J.C 12 (2000) 609-626
•
e-Print:
- hep-ex/9901017

Standard Model Predictions for CP Violation in B0 Meson Decay

- Phys.Rev.D 41 (1990) 1522
•
DOI:
- 10.1103/PhysRevD.41.1522

Quark mixing and CP violation

Ahmed Ali
(
- DESY
)
,
Boris Kayser
(
- NSF, Wash., D.C.
)

•
e-Print:
- hep-ph/9806230

Determination of the CKM unitarity triangle parameters by end 1999

F. Caravaglios
(
- Orsay
)
,
F. Parodi
(
- Genoa U. and
- INFN, Genoa
)
,
P. Roudeau
(
- Orsay, LAL
)
,
A. Stocchi
(
- Orsay, LAL
)

Indirect Measurement of the Vertex and Angles of the Unitarity Triangle

S. Mele
(
- CERN
)

- Phys.Rev.D 59 (1999) 113011
•
e-Print:
- hep-ph/9810333
•
DOI:
- 10.1103/PhysRevD.59.113011

Investigation of CP violation in $B^0 \to J/\psi K^0_{S}$ decays at LEP

OPAL

Collaboration

•

K. Ackerstaff

et al.

- Eur.Phys.J.C 5 (1998) 379-388
•
e-Print:
- hep-ex/9801022
•
DOI:
- 10.1007/s100520050284

A measurement of $\sin(2\beta)$ from $B \to J/\psi K^0_S$ with the {CDF} detector

CDF

Collaboration

•

T. Affolder
(
- LBL, Berkeley
)

et al.

- Phys.Rev.D 61 (2000) 072005
•
e-Print:
- hep-ex/9909003
•
DOI:
- 10.1103/PhysRevD.61.072005

ALEPH: A detector for electron-positron annnihilations at LEP

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 294 (1990) 121-178,
- Nucl.Instrum.Meth.A 303 (1991) 393 (erratum)
•
DOI:
- 10.1016/0168-9002(90)91831-U

The Design, construction and performance of the ALEPH silicon vertex detector

et al.

- Nucl.Instrum.Meth.A 379 (1996) 101-115
•
DOI:
- 10.1016/0168-9002(96)00281-1

Performance of the ALEPH detector at LEP

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 360 (1995) 481-506
•
DOI:
- 10.1016/0168-9002(95)00138-7

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics. Jetset Version 6.3: An Update

- Comput.Phys.Commun. 43 (1987) 367
•
DOI:
- 10.1016/0010-4655(87)90054-3

Heavy flavor production and decay with prompt leptons in the ALEPH detector

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Z.Phys.C 62 (1994) 179-198
•
DOI:
- 10.1007/BF01560237

Measurement of the Z resonance parameters at LEP

ALEPH

Collaboration

•

R. Barate
(
- Annecy, LAPP
)

et al.

- Eur.Phys.J.C 14 (2000) 1-50
•
DOI:
- 10.1007/s100520000319

Heavy quark tagging with leptons in the ALEPH detector

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 346 (1994) 461-475
•
DOI:
- 10.1016/0168-9002(94)90582-7

Production of K0 and Lambda in hadronic Z decays

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Z.Phys.C 64 (1994) 361-374
•
DOI:
- 10.1007/BF01560096

Experimental Studies on Multi-Jet Production in e+ e- Annihilation at PETRA Energies

JADE

Collaboration

•

W. Bartel
(
- DESY
)

et al.

- Z.Phys.C 33 (1986) 23,
•
DOI:
- 10.1007/BF01410449

QCD studies using a cone based jet finding algorithm for $e^{+} e^{-}$ collisions at LEP

OPAL

Collaboration

•

R. Akers

et al.

- Z.Phys.C 63 (1994) 197-212
•
DOI:
- 10.1007/BF01411011

Study of the B(s)0 anti-B(s)0 oscillation frequency using D(s)- lepton+ combinations in Z decays

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 377 (1996) 205-221
•
DOI:
- 10.1016/0370-2693(96)00451-0

Search for the standard model Higgs boson at the LEP-2 collider near S**(1/2) = 183-GeV

ALEPH

Collaboration

•

R. Barate
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 440 (1998) 403-418,
- Phys.Lett.B 447 (1999) 336-351
•
e-Print:
- hep-ex/9811032
•
DOI:
- 10.1016/S0370-2693(98)01239-8

A Study of time dependent CP violating asymmetries in $B^0 \to J/\psi K^0_{s}$ and $B^0 \to \psi_{2S} K^0_{s}$ decays

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

e-Print:
- hep-ex/0008048