Towards NNLO corrections in B --> D pi
Abstract
We describe the status of the calculation of the branching ratio for the decay B0 --> D+ pi- to NNLO in QCD factorization. Here, we present the result for the colour-singlet hard-scattering kernel. The calculation has been performed using multi-loop techniques like Laporta's reduction to master integrals, and Mellin-Barnes representations and differential equations for evaluating the latter.
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