First Measurement of $\phi_3$ with a Model-independent Dalitz Plot Analysis of $B^{\pm} \to DK, D \to K^o_s\pi\pi$ Decay - INSPIRE

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First Measurement of $\phi_3$ with a Model-independent Dalitz Plot Analysis of $B^{\pm} \to DK, D \to K^o_s\pi\pi$ Decay

Belle

Collaboration

Apr, 2012

16 pages

Published in:

Phys.Rev.D 85 (2012) 112014

e-Print:

1204.6561 [hep-ex]

DOI:

10.1103/PhysRevD.85.112014

PDG: r

_{B}

{{\mathit B}^{+}}

\rightarrow

{{\mathit D}^{0}}{{\mathit K}^{+}}

Experiments:

KEK-BF-BELLE

View in:

reference search96 citations

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Abstract: (arXiv)

We present the first measurement of the angle phi_3 of the Unitarity Triangle using a model-independent Dalitz plot analysis of B->DK, D->KsPiPi decays. The method uses an input measurements of the strong phase of the D->KsPiPi amplitude from the CLEO collaboration. The result is based on the full data set of 772x10^6 BBbar pairs collected by the Belle experiment at the Upsilon(4S) resonance. We obtain phi_3 = (77.3^{+15.1}_{-14.9} +- 4.1 +- 4.3)^{\circ} and the suppressed amplitude ratio r_B = 0.145 +- 0.030 +- 0.010 +- 0.011. Here the first error is statistical, the second is the experimental systematic uncertainty, and the third is the error due to the precision of the strong-phase parameters obtained by CLEO.

Note:

Replaced by published version. Fig. 8a added

12.15.Hh
13.25.Hw
14.40.Nd
CKM matrix: unitarity
B+: hadronic decay
D0: hadronic decay
Dalitz plot
decay: amplitude analysis
BELLE
electron positron: annihilation

References(25)

Figures(8)

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