Measurements of Charmless Hadronic b ---> s Penguin Decays in the pi+ pi- K+ pi- Final State and Observation of B0 ---> rho0 K+ pi- - INSPIRE

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Measurements of Charmless Hadronic b ---> s Penguin Decays in the pi+ pi- K+ pi- Final State and Observation of B0 ---> rho0 K+ pi-

Belle

Collaboration

•

S.-H. Kyeong
(
- Yonsei U.
)

May, 2009

6 pages

Published in:

Phys.Rev.D 80 (2009) 051103

e-Print:

0905.0763 [hep-ex]

DOI:

10.1103/PhysRevD.80.051103

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\mathit K}^{*}{(892)}^{0}}{{\mathit \rho}^{0}}

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search24 citations

Citations per year

Abstract: (arXiv)

We report measurements of charmless hadronic

B^{0}

decays into the \pipiKpi final state. The analysis uses a sample of \NBBUsed \BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy \epem collider at the \Y4S resonance. The decay B^0\to\rzKpi is observed for the first time/ the significance is

5.0\sigma

and the corresponding partial branching fraction for \MKpi \in (0.75,1.20) \GeVcc is [\absBFrzKpi]\BFunit. We also obtain the first evidence for B^0 \to \fzKpi with \SfzKpi\sigma significance and for B^0 \to\pipiKstz with \SpipiKstz\sigma significance. For the two-body decays B^0\to\rzKstz and B^0\to\fzKstz, the significances are

2.7\sigma

and

2.5\sigma

, respectively, and the upper limits on the branching fractions are 3.4\BFunit and 2.2\BFunit at 90% confidence level.

Note:

6 pages, 3 figures. submitted to PRL

11.30.Er
13.25.Hw
14.40.Nd
electron positron: annihilation
B: pair production
B0: branching ratio
B0: hadronic decay
final state: (0charm)
Feynman graph: penguin
BELLE

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