Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 29: Flavourphysik (Theorie)

T 29.4: Talk

Monday, March 24, 2014, 17:30–17:45, P6

Two-loop correction to the decay B→ D π — •Susanne Kränkl and Tobias Huber — Universität Siegen

The rich amount of B decays yield a broad spectrum of observables for investigating the flavour structure of the Standard Model. The theory description of various of these observables is based on QCD factorization, a model independent framework that exploits the structure of a decay amplitude in the heavy-mass limit. Two-loop corrections to certain non-leptonic B decay provide a further test of this framework.
In this talk we present the result for the hard scattering kernel to the decay B⁰→ D⁺ π⁻ to two-loop accuracy. The calculation was performed by applying commonly used multi-loop techniques like Laporta’s reduction to master integrals and Mellin Barnes representations and differential equations for evaluating the latter.