Computing non-factorizable pQCD corrections to hadronic B0 - B0 mixing matrix element within sum rules technique for three point Green functions
Abstract
In this talk I report on the results of a recent calculation of the αs corrections to a three-point correlation function at the three-loop level in QCD perturbation theory, which allows one to extract the matrix element of B0 - B0 mixing with next-to-leading order accuracy. The evaluation of mixing parameter at NLO allows for a consistent analysis of B0 - B0 mixing since the coefficient functions of the effective Hamiltonian for this process are known with the necessary accuracy.
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