Quasi-two-body decays $B\to K\rho\to K\pi\pi$ in perturbative QCD approach - INSPIRE

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Quasi-two-body decays $B\to K\rho\to K\pi\pi$ in perturbative QCD approach

Wen-Fei Wang
(
- Taiwan, Inst. Phys. and
- Shanxi U.
)
,
Hsiang-nan Li
(
- Taiwan, Inst. Phys.
)

Sep 15, 2016

11 pages

Published in:

Phys.Lett.B 763 (2016) 29-39

Published: Dec 10, 2016

e-Print:

1609.04614 [hep-ph]

DOI:

10.1016/j.physletb.2016.10.026

View in:

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Abstract: (Elsevier)

We analyze the quasi-two-body decays B→Kρ→Kππ in the perturbative QCD (PQCD) approach, in which final-state interactions between the pions in the resonant regions associated with the P -wave states ρ(770) and ρ′(1450) are factorized into two-pion distribution amplitudes. Adopting experimental inputs for the time-like pion form factors involved in two-pion distribution amplitudes, we calculate branching ratios and direct CP asymmetries of the B→Kρ(770),Kρ′(1450)→Kππ modes. It is shown that agreement of theoretical results with data can be achieved, through which Gegenbauer moments of the P -wave two-pion distribution amplitudes are determined. The consistency between the three-body and two-body analyses of the B→Kρ(770)→Kππ decays supports the PQCD factorization framework for exclusive hadronic B meson decays.

Note:

12 pages, 3 figures

13.20.He
13.25.Hw
13.30.Eg
quantum chromodynamics: perturbation theory
quantum chromodynamics
pi: form factor
meson: decay
distribution amplitude
two-pion
rho(770)

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Figures(4)

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