Perturbative QCD study of<i>B</i>→<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">D</mml:mi></mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mi mathvariant="normal">*</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>decays

Wu, Chung-Yi; Yeh, Tsung‐Wen; Li, Hsiang-nan

doi:10.1103/physrevd.53.4982

Cited by 35 publications

(33 citation statements)

References 33 publications

(72 reference statements)

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“…Retaining the parton transverse momenta k T , the nonfactorizable topologies generate strong phases from non-pinched singularities of the hard kernels [34]. For example, the virtual quark propagator in Fig.…”

Section: B → Dπ In Pqcdmentioning

confidence: 99%

Nonfactorizable contributions toB→D(*)Mdecays

et al. 2004

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While the naive factorization assumption works well for many two-body nonleptonic B meson decay modes, the recent measurement ofB → D ( * )0 M 0 with M = π, ρ and ω shows large deviation from this assumption. We analyze the B → D ( * ) M decays in the perturbative QCD approach based on k T factorization theorem, in which both factorizable and nonfactorizable contributions can be calculated in the same framework. Our predictions for the Bauer-Stech-Wirbel parameters, |a 2 /a 1 | = 0.43± 0.04 and Arg(a 2 /a 1 ) ∼ −42 • and |a 2 /a 1 | = 0.47 ± 0.05 and Arg(a 2 /a 1 ) ∼ −41 • , are consistent with the observed B → Dπ and B → D * π branching ratios, respectively. It is found that the large magnitude |a 2 | and the large relative phase between a 2 and a 1 come from color-suppressed nonfactorizable amplitudes. Our predictions for theB 0 → D * 0 ρ 0 , D * 0 ω branching ratios can be confronted with future experimental data.

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Section: B → Dπ In Pqcdmentioning

confidence: 99%

Nonfactorizable contributions toB→D(*)Mdecays

et al. 2004

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“…For the nonfactorizable amplitudes, the factorization formulas involve the kinematic variables of all the three mesons [49], and the Sudakov factor is given by S = S B S Φ S K .…”

Section: B Factorization Formulasmentioning

confidence: 99%

Perturbative QCD analysis ofB→φKdecays and power counting

Chen

Keum

2001

Phys. Rev. D

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We investigate exclusive nonleptonic B meson decays B → φK in perturbative QCD formalism. It is shown that the end-point (logarithmic and linear) singularities in decay amplitudes do not exist, after k T and threshold resummations are included. Power counting for emission and annihilation topologies of diagrams, including both factorizable and nonfactorizable ones, is discussed with Sudakov effects taken into account. Our predictions for the branching ratios B(B → φK) ∼ 10 × 10 −6 are larger than those (∼ 4 × 10 −6 ) from the factorization approach because of dynamical enhancement of penguin contributions. Whether this enhancement is essential for penguin-dominated modes can be justified by experimental data.

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“…Nonfactorizable amplitudes have been also considered in the BBNS approach, which are, however, treated in a different way. For example, they are real because of some approximation in [22], but complex in PQCD [26]. Generally speaking, nonfactorizable contributions are less important compared to factorizable ones except in the cases where factorizable contributions are proportional to the small Wilson coefficients a 2 or vanish.…”

Section: Nonfactorizable and Annihilation Contributionsmentioning

confidence: 99%

“…It is easy to confirm these observations by interchaning the integration variables x 2 and x 3 in the second terms of Eqs. (23) and (26). The factorization formulas for F a1 from Fig.…”

Section: Factorization Formulasmentioning

confidence: 99%

Final-state interaction andB→KKdecays in perturbative QCD

Chen¹,

Li²

2000

Phys. Rev. D

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We predict branching ratios and CP asymmetries of the B → KK decays using perturbative QCD factorization theorem, in which tree, penguin, and annihilation contributions, including both factorizable and nonfactorizable ones, are expressed as convolutions of hard six-quark amplitudes with universal meson wave functions. The unitarity angle φ 3 = 90 o and the B and K meson wave functions extracted from experimental data of the B → Kπ and ππ decays are employed. Since the B → KK decays are sensitive to final-state-interaction effects, the comparision of our predictions with future data can test the neglect of these effects in the above formalism. The CP asymmetry in the B ± → K ± K 0 modes and the B 0 d → K ± K ∓ branching ratios depend on annihilation and nonfactorizable amplitudes. The B → KK data can also verify the evaluation of these contributions.

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Perturbative QCD study ofB→D(*)decays

Cited by 35 publications

References 33 publications

Nonfactorizable contributions toB→D(*)Mdecays

Nonfactorizable contributions toB→D(*)Mdecays

Perturbative QCD analysis ofB→φKdecays and power counting

Final-state interaction andB→KKdecays in perturbative QCD

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