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arXiv · hep-ph/0306032

B0 - anti-B0 mixing beyond factorization

J. G. Korner·A. I. Onishchenko·A. A. Petrov·A. A. Pivovarov
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Abstract

We present a calculation of the B0 - anti-B0 mixing matrix element in the framework of QCD sum rules for three-point functions. We compute alpha_s corrections to a three-point function at the three-loop level in QCD perturbation theory, which allows one to extract the matrix element with next-to-leading order (NLO) accuracy. This calculation is imperative for a consistent evaluation of experimentally-measured mixing parameters since the coefficient functions of the effective Hamiltonian for B0 - anti-B0 mixing are known at NLO. We find that radiative corrections violate factorization at NLO; this violation is under full control and amounts to 10%.

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J. G. Korner, A. I. Onishchenko, A. A. Petrov, A. A. Pivovarov. 2003-06-03. B0 - anti-B0 mixing beyond factorization. https://doi.org/10.1103/physrevlett.91.192002

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