Measurement of the quark mixing parameter cos(2phi(1)) using time-dependent Dalitz analysis of anti-B0 ---> D [K(s)0 pi+ pi-] h0 - INSPIRE

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Measurement of the quark mixing parameter cos(2phi(1)) using time-dependent Dalitz analysis of anti-B0 ---> D [K(s)0 pi+ pi-] h0

Belle

Collaboration

•

P. Krokovny

May, 2006

6 pages

Published in:

Phys.Rev.Lett. 97 (2006) 081801

e-Print:

hep-ex/0605023 [hep-ex]

DOI:

10.1103/PhysRevLett.97.081801

PDG: sin

(2\beta _{{\mathrm {eff}}})

{{\mathit B}^{0}}

\rightarrow

{{\mathit K}_S^0}

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

_{{{\mathit D}^{(*)}}}{{\mathit h}^{0}}

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search72 citations

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Abstract:

We present a measurement of the angle phi1 of the CKM Unitarity Triangle using time-dependent Dalitz analysis of D -> Ks pi+ pi- decays produced in neutral B meson decay to a neutral D meson and a light meson (B0bar -> D(*) h0). The method allows a direct extraction of 2phi1 and, therefore, helps to resolve the ambiguity between 2phi1 and pi-2phi1 in the measurement of sin 2phi1. We obtain sin 2phi1=0.78+-0.44+-0.22 and cos 2phi1=1.87+0.40+0.22 -0.53-0.32 The sign of cos 2phi1 is determined to be positive at 98.3% C.L.

11.30.Er
14.40.Nd
12.15.Hh
13.25.Hw
electron positron: colliding beams
electron positron: annihilation
Upsilon(10570): electroproduction
B: pair production
anti-B0: hadronic decay
Dalitz plot

References(16)

Figures(0)

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