First model-independent Dalitz analysis of $B^0 \to DK^{*0}$, $D\to K_S^0\pi^+\pi^-$ decay - INSPIRE

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First model-independent Dalitz analysis of $B^0 \to DK^{*0}$ , $D\to K_S^0\pi^+\pi^-$ decay

Belle

Collaboration

•

K. Negishi
(
- Tohoku U.
)

Sep 3, 2015

16 pages

Published in:

PTEP 2016 (2016) 4, 043C01

Published: Apr 1, 2016

e-Print:

1509.01098 [hep-ex]

DOI:

10.1093/ptep/ptw030

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search25 citations

Citations per year

Abstract: (Oxford University Press)

We report a measurement of the amplitude ratio

r_S

of

B^0 \to D^0K^{\ast 0}

and

B^0 \to \bar {D^0}K^{\ast 0}

decays with a Dalitz analysis of

D\to K_S^0\pi ^+\pi ^-

decays, for the first time using a model-independent method. We set an upper limit

r_S < 0.87

at the 68% confidence level, using the full data sample of

711\,{\rm fb}^{-1}

corresponding to

772\times 10^6

B\bar {B}

pairs collected at the

\Upsilon (4S)

resonance with the Belle detector at the KEKB

e^+e^-

collider. This result is obtained from observables

x_- = +0.4 ^{+1.0 +0.0}_{-0.6 -0.1} \pm 0.0

,

y_- = -0.6 ^{+0.8 +0.1}_{-1.0 -0.0} \pm 0.1

,

x_+ = +0.1 ^{+0.7 +0.0}_{-0.4 -0.1} \pm 0.1

, and

y_+ = +0.3 ^{+0.5 +0.0}_{-0.8 -0.1} \pm 0.1

, where

x_\pm = r_S \cos (\delta _S \pm \phi _3)

,

y_\pm = r_S \sin (\delta _S \pm \phi _3)

, and

\phi _3\ (\delta _S)

is the weak (strong) phase difference between

B^0 \to D^0K^{\ast 0}

and

B^0 \to \bar {D^0}K^{\ast 0}

.

Note:

arXiv admin note: substantial text overlap with arXiv:1502.07550

Cabibbo-Kobayashi-Maskawa quark-mixing matrix
CP violation
Experimental Particle Physics
electron positron: annihilation
electron positron: colliding beams
B: pair production
B0: hadronic decay
D: hadronic decay
Dalitz plot
Upsilon(10570)

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Figures(7)

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