Theory of B -> K(*)l+l- decays at high q^2: OPE and quark-hadron duality

Details Theory of B -> K(*)l+l- decays at high q^2: OPE and quark-hadron duality Theory of B -> K(*)l+l- decays at high q^2: OPE and quark-hadron duality

2011-01-26

arxiv.org/abs/1101.5118v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 7 figures

Scientific paper

We develop a systematic framework for exclusive rare B decays of the type B -> K(*)l+l- at large dilepton invariant mass q^2. It is based on an operator product expansion (OPE) for the required matrix elements of the nonleptonic weak Hamiltonian in this kinematic regime. Our treatment differs from previous work by a simplified operator basis, the explicit calculation of matrix elements of subleading operators, and by a quantitative estimate of duality violation. The latter point is discussed in detail, including the connection with the existence of an OPE and an illustration within a simple toy model.

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