B → A transitions in the light-cone QCD sum rules with the chiral current

SUN Yan-Jun; WANG Zhi-Gang; HUANG Tao

doi:10.1088/1674-1137/36/11/003

Chinese Physics C> 2012, Vol. 36> Issue(11) : 1046-1054 DOI: 10.1088/1674-1137/36/11/003

B → A transitions in the light-cone QCD sum rules with the chiral current

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Abstract：
In this article, we calculate the form-factors of the transitions B → a₁(1260), b₁(1235) in the leading-order approximation using the light-cone QCD sum rules. In calculations, we choose the chiral current to interpolate the B-meson, which has the outstanding advantage that the twist-3 light-cone distribution amplitudes of the axial-vector mesons makes no contributions, and the resulting sum rules for the form-factors suffer from far fewer uncertainties. Then we study the semi-leptonic decays B → a₁(1260) lv_l, b₁(1235) lv_l (l=e,μ,τ), and make predictions for the differential decay widths and decay widths, which can be compared with the experimental data in the coming future.

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SUN Yan-Jun, WANG Zhi-Gang and HUANG Tao. B → A transitions in the light-cone QCD sum rules with the chiral current[J]. Chinese Physics C, 2012, 36(11): 1046-1054. doi: 10.1088/1674-1137/36/11/003

SUN Yan-Jun, WANG Zhi-Gang and HUANG Tao. B → A transitions in the light-cone QCD sum rules with the chiral current[J]. Chinese Physics C, 2012, 36(11): 1046-1054. doi: 10.1088/1674-1137/36/11/003 shu

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Received: 2012-02-15
Revised: 2012-03-14

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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

B → A transitions in the light-cone QCD sum rules with the chiral current

Corresponding author: SUN Yan-Jun,

Corresponding author: WANG Zhi-Gang,

Corresponding author: HUANG Tao,

Received Date: 2012-02-15

Accepted Date: 2012-03-14

Available Online: 2012-11-05

Abstract: In this article, we calculate the form-factors of the transitions B → a₁(1260), b₁(1235) in the leading-order approximation using the light-cone QCD sum rules. In calculations, we choose the chiral current to interpolate the B-meson, which has the outstanding advantage that the twist-3 light-cone distribution amplitudes of the axial-vector mesons makes no contributions, and the resulting sum rules for the form-factors suffer from far fewer uncertainties. Then we study the semi-leptonic decays B → a₁(1260) lv_l, b₁(1235) lv_l (l=e,μ,τ), and make predictions for the differential decay widths and decay widths, which can be compared with the experimental data in the coming future.

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B → A transitions in the light-cone QCD sum rules with the chiral current

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