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Form factors of $B_{u, d, s}$ decays into $p$ -wave axial-vector mesons in the light-cone sum rule approach

Department of Physics, Chung Yuan Christian University, Chung-Li 320, Taiwan

Phys. Rev. D 78, 034018 – Published 18 August, 2008

DOI: https://doi.org/10.1103/PhysRevD.78.034018

Abstract

We calculate the vector and axial-vector form factors of $B_{u, d, s}$ decays into $P$ -wave axial-vector mesons in the light-cone sum rule approach. For the sum rule results, we have included corrections of order $m_{A} / m_{b}$ , where $m_{A}$ is the mass of the axial-vector meson $A$ . The results are relevant to the light-cone distribution amplitudes of the axial-vector mesons. It is important to note that, owing to the $G$ parity, the chiral-even two-parton light-cone distribution amplitudes of the ${}^{3}P_{1}$ ( ${}^{1}P_{1}$ ) mesons are symmetric (antisymmetric) under the exchange of quark and antiquark momentum fractions in the SU(3) limit. For chiral-odd light-cone distribution amplitudes, it is the other way around. The predictions for decay rates of $B_{u, d, s} \to A e ν_{e}$ are also presented.

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Form factors of $B_{u, d, s}$ decays into $p$ -wave axial-vector mesons in the light-cone sum rule approach

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Form factors of Bu,d,s decays into p-wave axial-vector mesons in the light-cone sum rule approach

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Form factors of $B_{u, d, s}$ decays into $p$ -wave axial-vector mesons in the light-cone sum rule approach