Study of B0 ---> rho+- pi-+ time-dependent CP violation at Belle - INSPIRE

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Study of B0 ---> rho+- pi-+ time-dependent CP violation at Belle

Belle

Collaboration

•

C.C. Wang
(
- Taiwan, Natl. Taiwan U.
)

Aug, 2004

10 pages

Published in:

Phys.Rev.Lett. 94 (2005) 121801

e-Print:

hep-ex/0408003 [hep-ex]

DOI:

10.1103/PhysRevLett.94.121801

PDG:

\mathit A_{CP}({{\mathit B}^{0}}

\rightarrow

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

Report number:

BELLE-PREPRINT-2004-21,
KEK-PREPRINT-2004-34

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search51 citations

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Abstract:

We present a time-dependent analysis of CP violation in B0 -> rho pi decays based on a 140 1/fb data sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We fully reconstruct one neutral B meson in the rho+-pi-+ final state and identify the flavor of the accompanying B meson from its decay products. We obtain the charge asymmetry ACP = -0.16+-0.10(stat)+-0.02(syst). An unbinned maximum likelihood fit to the proper-time distributions yields C = 0.25+-0.17(stat)+0.02-0.06(syst), DC = 0.38+-0.18(stat)+0.02-0.04(syst), S = -0.28+-0.23(stat)+0.10-0.08(syst), and DS = -0.30+-0.24(stat)+-0.09(syst). The direct CP violation parameters for B -> rho+pi- and B -> rho-pi+ decays are A+- = -0.02+-0.16(stat)+0.05-0.02(syst) and A-+ = -0.53+-0.29(stat)+0.09-0.04(syst).

11.30.Er
14.40.Nd
13.25.Hw
12.15.Hh
CP invariance
B mesons
meson hadronic decay
electron positron: colliding beams
electron positron: annihilation
Upsilon(10570): electroproduction

References(23)

Figures(0)

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