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arXiv · hep-ph/0106067

Systematic approach to exclusive B ->V l^+l^-, V gamma decays

M. Beneke·Th. Feldmann·D. Seidel
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Abstract

We show -- by explicit computation of first-order corrections -- that the QCD factorization approach previously applied to hadronic two-body decays and to form factor ratios also allows us to compute non-factorizable corrections to exclusive, radiative B meson decays in the heavy quark mass limit. This removes a major part of the theoretical uncertainty in the region of small invariant mass of the photon. We discuss in particular the decays B\to K^* γand B\to K^* l^+l^- and complete the calculation of corrections to the forward-backward asymmetry zero. The new correction shifts the asymmetry zero by 30%, but the result confirms our previous conclusion that the asymmetry zero provides a clean phenomenological determination of the Wilson coefficient C_9.

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M. Beneke, Th. Feldmann, D. Seidel. 2001-07-10. Systematic approach to exclusive B ->V l^+l^-, V gamma decays. https://doi.org/10.1016/s0550-3213(01)00366-2

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