München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 14: Flavorphysik (Theorie) 1

T 14.9: Talk

Tuesday, March 10, 2009, 18:45–19:00, M001

Precision predictions for two-body hadronic B decays — •Tobias Huber, Martin Beneke, and Xin-Qiang Li — Institut f. Theoretische Physik E, RWTH Aachen

We describe the calculation of the two-loop vertex corrections to the topological tree amplitudes in the QCD Factorization framework for hadronic two-body B decays.

We will start by briefly introducing the theoretical framework of the effective Hamiltonian and QCD Factorization, and will then motivate the need for the two-loop NNLO calculation for precision predictions of branching ratios and CP asymmetries.

We will then describe some techniques that are applied in the completely analytical computation of the amplitudes. Among these techniques are the Laporta reduction of scalar integrals to master integrals, and several methods to evaluate the latter.