Study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>B</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mo>→</mml:mo><mml:mi>K</mml:mi><mml:mi>K</mml:mi></mml:math>decay with perturbative QCD approach

Yang, Yueling; Sun, J. F.; Wang, Na

doi:10.1103/physrevd.81.074012

Cited by 20 publications

(17 citation statements)

References 35 publications

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“…Thus the Feynman diagrams, including factorizable, nonfactorizable, and annihilation type, are all calculable. Up to now, the pure annihilation type of charmless B c → PP; PV; VV; AV; AA; AP; SP; SV decays [18][19][20][21][22][23][24] and the charm decays of B c → D ðÃÞ ðsÞ ðP; V; T; D ðÃÞ ðsÞ Þ [25][26][27][28][29] have been studied systematically in the pQCD approach, where the term P; V; A; S; T refers to the pesudoscalar, vector, axial-vector, scalar and tensor charmless mesons, respectively.…”

Section: Introductionmentioning

confidence: 99%

S-wave ground state charmonium decays ofBcmesons in the perturbative QCD approach

Rui

Zou

2014

Phys. Rev. D

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We make a systematic investigation on the two-body nonleptonic decays B c → J=Ψðη c Þ; M by employing the perturbative QCD approach based on k T factorization, where M is a light pseudoscalar or vector or a heavy charmed meson. We predict the branching ratios and direct CP asymmetries of these B c decays and also the transverse polarization fractions of B c → J=ΨV; J=ψD Ã ðsÞ decays. It is found that these decays have a large branching ratios of the order of 10 −4 − 10 −2 and could be measured by the future LHCb experiment. Our predictions for the ratios of branching fractions c →J=Ψπ þ Þ are in good agreement with the data. A large transverse polarization fraction which can reach 48% is predicted in B þ c → J=ΨD Ãþ s decay, which is consistent with the data. We find a possible direct CP violation in B c → J=ψD Ã decays, which are helpful to test the CP violating effects in B c decays.

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Section: Introductionmentioning

confidence: 99%

S-wave ground state charmonium decays ofBcmesons in the perturbative QCD approach

Rui

Zou

2014

Phys. Rev. D

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“…[7][8][9][10][11][12][13][14][15][16][17] to study various B c decays, where the LCDA of B c has been used to parametrize the non-perturbative physics in the system. Meanwhile the NRQCD factorization has been adopted in refs.…”

Section: Jhep12(2017)012mentioning

confidence: 99%

Relativistic corrections to light-cone distribution amplitudes of S-wave Bc mesons and heavy quarkonia

Wang

Yang

et al. 2017

J. High Energ. Phys.

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In collinear factorization, light-cone distribution amplitudes (LCDAs) are key ingredients to calculate the production rate of a hadron in high energy exclusive processes. For a doubly-heavy meson system (such as B c , J/ψ, Υ etc), the LCDAs contain perturbative scales that can be integrated out and then are re-factorized into products of perturbatively calculable distribution parts and non-relativistic QCD matrix elements. In this re-factorization scheme, the LCDAs are known at next-to-leading order in the strong coupling constant α s and at leading order in the velocity expansion. In this work, we calculate the O(v 2 ) corrections to twist-2 LCDAs of S-wave B c mesons. These results are applicable to heavy quarkonia like η c,b , J/ψ and Υ by setting m b = m c . We apply these relativistically corrected LCDAs to study their inverse moments and a few Gegenbauer moments which are important for phenomenological study. We point out that the relativistic corrections are sizable, and comparable with the next-to-leading order radiative corrections. These results for LCDAs are useful in future theoretical analyses of the productions of heavy quarkonia and B c mesons.

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“…There are uncontrolled large theoretical errors with quite different numerical results, and most of them cannot give any theoretical error estimates because of the unreliability of these models. The perturbative QCD approach (pQCD) [16][17][18][19] based on k T factorization, which not only can deal with the emission diagrams corresponding to the naive factorization terms basically, but can also handle well the nonfactorizable diagrams by introducing the wave function of the light meson in the final states of the B c decay modes, is widely used in the nonleptonic two-body B c decays [20][21][22][23][24][25][26][27][28][29][30][31]. In our recent work [32], the pQCD approach was used successfully in describing the S-wave ground state charmonium decays of B c meson based on the harmonic-oscillator wave functions for the charmonium 1S states.…”

Section: B(b C → ψ(2s)π ) B(b C → J/ψπ )mentioning

confidence: 99%

The $$B_c\rightarrow \psi (2S)\pi $$ B c → ψ ( 2 S ) π , $$\eta _c(2S)\pi $$ η c ( 2 S ) π decays in the perturbative QCD approach

Rui

Wang

et al. 2015

Eur. Phys. J. C

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Nonleptonic two-body B c decays including radially excited ψ(2S) or η c (2S) mesons in the final state are studied using the perturbative QCD approach based on k T factorization. The charmonium distribution amplitudes are extracted from the n = 2, l = 0 Schrödinger states for the harmonic oscillator potential. Utilizing these distribution amplitudes, we calculate the numerical results of the B c → ψ(2S), η c (2S) transition form factors and branching fractions of B c → ψ(2S)π, η c (2S)π decays. The ratio between two decay modes B c → ψ(2S)π and B c → J/ψπis compatible with the experimental data within uncertainties, which indicates that the harmonic-oscillator wave functions for ψ(2S) and η c (2S) work well. It is found that the branching fraction of B c → η c (2S)π , which is dominated by the twist-3 charmonium distribution amplitude, can reach the order of 10 −3 . We hope it can be measured soon in the LHCb experiment.

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Study ofBc→KKdecay with perturbative QCD approach

Cited by 20 publications

References 35 publications

S-wave ground state charmonium decays ofBcmesons in the perturbative QCD approach

S-wave ground state charmonium decays ofBcmesons in the perturbative QCD approach

Relativistic corrections to light-cone distribution amplitudes of S-wave Bc mesons and heavy quarkonia

The $$B_c\rightarrow \psi (2S)\pi $$ B c → ψ ( 2 S ) π , $$\eta _c(2S)\pi $$ η c ( 2 S ) π decays in the perturbative QCD approach

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