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

  • 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) lvl, b1(1235) lvl (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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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,

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) lvl, b1(1235) lvl (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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