München 2009 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 14: Flavorphysik (Theorie) 1

T 14.8: Vortrag

Dienstag, 10. März 2009, 18:30–18:45, M001

NNLO QCD corrections to charmless hadronic B decays — •Guido Bell — Institut für Theoretische Teilchenphysik, Universität Karlsruhe

B decays into a pair of light mesons reveal important information on the underlying four-quark interactions, which can used to test the CKM mechanism of flavour mixing and CP violation. While experimental measurements at current and future B physics experiments will reach unprecedented precision, the main obstacle for precise theoretical predictions are the complicated strong interaction effects related to the three hadrons.

In recent years factorization theorems have been established which systematically disentangle perturbative from non-perturbative effects. This in particular allows to improve the theoretical predictions by computing higher order radiative corrections. I will report on the current effort to compute NNLO QCD corrections to charmless hadronic B decays and illustrate their impact in the B →ππ channels.