Branching fractions of B<sub>(c)</sub> decays involving J/&psi; and <em>X</em>(3872)

Y. K. Hsiao; Chao-Qiang Geng

doi:10.1088/1674-1137/41/1/013101

Chinese Physics C> 2017, Vol. 41> Issue(1) : 013101 DOI: 10.1088/1674-1137/41/1/013101

Branching fractions of B_(c) decays involving J/ψ and X(3872)

Y. K. Hsiao ^1,2,3 ,
Chao-Qiang Geng ^1,2,3

1.
Chongqing University of Posts &
2.
Physics Division, "
3.
Department of Physics, "

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Abstract：
We study two-body B_(c)→M_c(π,K) and semileptonic B_c→M_cl^-ν_l decays with M_c=(J/ψ,X_c⁰), where X_c⁰≡X⁰(3872) is regarded as the tetraquark state ccuu(dd). With the decay constant f_{X_c⁰}=(234±52) MeV determined from the data, we predict that B(B^-→X_c⁰π^-)=(11.5±5.7)×10^-6, B(B⁰→X_c⁰K⁰)=(2.1±1.0)×10^-4, and B(B_s⁰→X_c⁰K⁰)=(11.4±5.6)×10^-6. With the form factors in QCD models, we calculate that B(B_c^-→X_c⁰π^-,X_c⁰K^-)=(6.0±2.6)×10^-5 and (4.7±2.0)×10^-6, and B(B_c^-→J/ψμ^-ν_μ, X_c⁰μ^-ν_μ)=(2.3±0.6)×10^-2 and (1.35±0.18)×10^-3, respectively, and extract the ratio of the fragmentation fractions to be f_c/f_u=(6.4±1.9)×10^-3.
- B decays ,
- Bc decays ,
- J/ ,
- X(3872)

References

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Y. K. Hsiao and Chao-Qiang Geng. Branching fractions of B_(c) decays involving J/ψ and X(3872)[J]. Chinese Physics C, 2017, 41(1): 013101. doi: 10.1088/1674-1137/41/1/013101

Y. K. Hsiao and Chao-Qiang Geng. Branching fractions of B_(c) decays involving J/ψ and X(3872)[J]. Chinese Physics C, 2017, 41(1): 013101. doi: 10.1088/1674-1137/41/1/013101 shu

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Received: 2016-07-18

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Supported in part by National Center for Theoretical Sciences, National Science Council (NSC-101-2112-M-007-006-MY3), MoST (MoST-104-2112-M-007-003-MY3) National Science Foundation of China (11675030)

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Branching fractions of B_(c) decays involving J/ψ and X(3872)

1. Chongqing University of Posts &

2. Physics Division, "

3. Department of Physics, "

Received Date: 2016-07-18

Available Online: 2017-01-05

Fund Project: Supported in part by National Center for Theoretical Sciences, National Science Council (NSC-101-2112-M-007-006-MY3), MoST (MoST-104-2112-M-007-003-MY3) National Science Foundation of China (11675030)

Abstract: We study two-body B_(c)→M_c(π,K) and semileptonic B_c→M_cl^-ν_l decays with M_c=(J/ψ,X_c⁰), where X_c⁰≡X⁰(3872) is regarded as the tetraquark state ccuu(dd). With the decay constant f_{X_c⁰}=(234±52) MeV determined from the data, we predict that B(B^-→X_c⁰π^-)=(11.5±5.7)×10^-6, B(B⁰→X_c⁰K⁰)=(2.1±1.0)×10^-4, and B(B_s⁰→X_c⁰K⁰)=(11.4±5.6)×10^-6. With the form factors in QCD models, we calculate that B(B_c^-→X_c⁰π^-,X_c⁰K^-)=(6.0±2.6)×10^-5 and (4.7±2.0)×10^-6, and B(B_c^-→J/ψμ^-ν_μ, X_c⁰μ^-ν_μ)=(2.3±0.6)×10^-2 and (1.35±0.18)×10^-3, respectively, and extract the ratio of the fragmentation fractions to be f_c/f_u=(6.4±1.9)×10^-3.

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Branching fractions of B_(c) decays involving J/ψ and X(3872)