Branching ratio and CP-asymmetry of Bs→ρ(ω)K decays in the perturbative QCD approach

Xiao, Z. J.; Chen, Xin-Fen; Guo, Dong-Qin

doi:10.1140/epjc/s10052-007-0209-7

Cited by 20 publications

(6 citation statements)

References 48 publications

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“…We also give the predictions on the sum of the CP-averaged branching ratios of B0 → π − ρ + and B0 → π + ρ − and the other three B (s) decays in table I and table VI. In order to compare with QCDF approach [10,41,42,43,44,45] and PQCD approach [46,47,48,49,50,51,52,53,54,55,56,57,58], we also collect their results in these tables, together with the experimental data available at HFAG [39].…”

Section: Numerical Analysis Of B → V P Decays a Input Parametersmentioning

confidence: 99%

Charmless Two-body $B(B_s)\to VP$ decays In Soft-Collinear-Effective-Theory

Wang,

Yang

et al. 2008

Preprint

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We provide the analysis of charmless two-body B → V P decays under the framework of the softcollinear-effective-theory (SCET), where V (P ) denotes a light vector (pseudoscalar) meson. Besides the leading power contributions, some power corrections (chiraly enhanced penguins) are also taken into account. Using the current available B → P P and B → V P experimental data on branching fractions and CP asymmetry variables, we find two kinds of solutions in χ 2 fit for the 16 nonperturbative inputs which are essential in the 87 B → P P and B → V P decay channels. Chiraly enhanced penguins can change several charming penguins sizably, since they share the same topology.However, most of the other non-perturbative inputs and predictions on branching ratios and CP asymmetries are not changed too much. With the two sets of inputs, we predict the branching fractions and CP asymmetries of other modes especially Bs → V P decays. The agreements and differences with results in QCD factorization and perturbative QCD approach are analyzed. We also study the time-dependent CP asymmetries in channels with CP eigenstates in the final states and some other channels such as B0 /B 0 → π ± ρ ∓ and B0s /B 0 s → K ± K * ∓ . In the perturbative QCD approach, the (S − P )(S + P ) penguins in annihilation diagrams play an important role. Although they have the same topology with charming penguins in SCET, there are many differences between the two objects in weak phases, magnitudes, strong phases and factorization properties.

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Section: Numerical Analysis Of B → V P Decays a Input Parametersmentioning

confidence: 99%

Charmless Two-body $B(B_s)\to VP$ decays In Soft-Collinear-Effective-Theory

Wang,

Yang

et al. 2008

Preprint

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“…with the decay constant f B s = (0.23 ± 0.02)GeV [44,[53][54][55]. The corresponding shape parameter ω in the LCDA of the B s meson is usually taken the value (0.5 ± 0.05)GeV.…”

Section: Formalism and Wave Functionmentioning

confidence: 99%

Charmless $$B_s\rightarrow V S$$ decays in PQCD approach

Liu

et al. 2022

Eur. Phys. J. C

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In this work, we investigate the $$B_s\rightarrow V S$$ B s → V S decays in the perturbative QCD approach, where V and S denote the vector meson and scalar meson respectively. Based on the two-quark structure, considering two different scenarios for describing the scalar mesons, we calculate the branching fractions and the direct CP asymmetries of all $$B_s\rightarrow VS$$ B s → V S decays. Most branching fractions are predicted to be at $$10^{-7}$$ 10 - 7 to $$10^{-5}$$ 10 - 5 , which could be measured in the LHCb and Belle-II experiments, especially for these color-allowed decays $$B_s\rightarrow \kappa (800)(K_0^*(1430))K^*$$ B s → κ ( 800 ) ( K 0 ∗ ( 1430 ) ) K ∗ and $$B_s\rightarrow K_0^{*-}(1430)\rho ^+$$ B s → K 0 ∗ - ( 1430 ) ρ + . It is found that the branching fractions of $$B_s\rightarrow K_0^{*0}(1430){\bar{K}}^{*0}$$ B s → K 0 ∗ 0 ( 1430 ) K ¯ ∗ 0 and $$B_s\rightarrow K_0^{*+}(1430){\bar{K}}^{*-}$$ B s → K 0 ∗ + ( 1430 ) K ¯ ∗ - are very sensitive to the scenarios, which can be used to determine whether $$K_0^{*0}(1430)$$ K 0 ∗ 0 ( 1430 ) belongs to the ground state or the first excited state, if the data were available. We also note that some decays have large direct CP asymmetries, some of which are also sensitive to the scenarios, such as the $$B_s \rightarrow a_0^+(1450)K^{*-}$$ B s → a 0 + ( 1450 ) K ∗ - and the $$B_s\rightarrow f_0(1500) K^{*0}$$ B s → f 0 ( 1500 ) K ∗ 0 decays. Since the experimental measurements of $$B_s\rightarrow VS$$ B s → V S decays are on the way, combined with the available data in the future, we expect the theoretical predictions will shed light on the structure of the scalar mesons.

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“…with the decay constant f B s = (0.23 ± 0.02)GeV [45, [54][55][56]. The corresponding shape parameter ω in the LCDA of the B s meson is usually taken the value (0.5 ± 0.05)GeV.…”

Section: Formalism and Wave Functionmentioning

confidence: 99%

Charmless $B_s\to V S$ Decays in PQCD Approach

Liu,

Zou,

et al. 2021

Preprint

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In this work, we investigate the B s → V S decays in the perturbative QCD approach, where V and S denote the vector meson and scalar meson respectively. Based on the two-quark structure, considering two different scenarios for describing the scalar mesons, we calculate the branching fractions and the direct CP asymmetries of all B s → V S decays. Most branching fractions are predicted to be at 10 −7 to 10 −5 , which could be measured in the LHCb and Belle-II experiments, especially for these color-allowed B s → κ(800)(K * 0 (1430))K * decays. It is found that the branching fractions of B s → K * 0 0 (1430) K * 0 and B s → K * + 0 (1430) K * − are very sensitive to the scenarios, which can be used to determine whether K * 0 0 (1430) belongs to the ground state or the first excited state, if the data were available. We also note that some decays have large direct CP asymmetries, some of which are also sensitive to the scenarios, such as the B s → a + 0 (1450)K * − and the B s → f 0 (1500)K * 0 decays. Since the experimental measurements of B s → V S decays are on the way, combined with the available data in the future, we expect the theoretical predictions will shed light on the structure of the scalar mesons.

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Branching ratio and CP-asymmetry of Bs→ρ(ω)K decays in the perturbative QCD approach

Cited by 20 publications

References 48 publications

Charmless Two-body $B(B_s)\to VP$ decays In Soft-Collinear-Effective-Theory

Charmless Two-body $B(B_s)\to VP$ decays In Soft-Collinear-Effective-Theory

Charmless $$B_s\rightarrow V S$$ decays in PQCD approach

Charmless $B_s\to V S$ Decays in PQCD Approach

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