Measurement of the CP violation parameter $\sin 2 \phi_{1}$ in $B^0_{d}$ meson decays - INSPIRE

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Measurement of the CP violation parameter $\sin 2 \phi_{1}$ in $B^0_{d}$ meson decays

Belle

Collaboration

Feb, 2001

13 pages

Published in:

Phys.Rev.Lett. 86 (2001) 2509-2514

e-Print:

hep-ex/0102018 [hep-ex]

DOI:

10.1103/PhysRevLett.86.2509

PDG: sin

(2\beta )

Report number:

KEK-PREPRINT-2000-142,
BELLE-PREPRINT-2001-1

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

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Abstract: (arXiv)

We present a measurement of the Standard Model CP violation parameter sin(2phi_1) based on a 10.5 fb^{-1} data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e+e- collider. One neutral B meson is reconstructed in the J/psi K_S, psi(2S) K_S, chi_{c1} K_S, eta_c K_S, J/psi K_L or J/psi pi^0 CP-eigenstate decay channel and the flavor of the accompanying B meson is identified from its charged particle decay products. From the asymmetry in the distribution of the time interval between the two B-meson decay points, we determine sin(2phi_1) = 0.58 +0.32-0.34 (stat) +0.09-0.10 (syst).

Note:

LaTex, 13 pages, 3 figures, submitted to P.R.L Report-no: KEK preprint 2000-142, Belle preprint 2001-1

electron positron: colliding beams
electron positron: annihilation
Upsilon(10570): electroproduction
B0: pair production
B0: hadronic decay
charmonium
quarkonium: decay modes
K0: hadronic decay
pi0
particle identification: flavor

References(8)

Figures(0)

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