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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

. (Aug 5, 2008)

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 \$^3P\_1\$ (\$^1P\_1\$) mesons are symmetric (antisymmetric) under the exchange of quark and anti-quark 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 A e \nu\_e\$ are also presented.

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