München 2009 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 14: Flavorphysik (Theorie) 1
T 14.6: Vortrag
Dienstag, 10. März 2009, 18:00–18:15, M001
b→ s ℓ+ ℓ− in the high q2 region at two-loop — Christoph Greub, •Volker Pilipp, and Christof Schüpbach — Center for Research and Education in Fundamental Physics, Bern, Switzerland
In the search for new physics the inclusive decay mode b→ s ℓ+ ℓ−, which is induced by flavour changing neutral currents, plays an inportant role. Operator product expansion allows a precise prediction of this mode in the region, where the invariant mass squared of the leptons q2 is far away from the cc resonances. Whereas the two-loop corrections in the region below the resonances have been available for a couple of years (Asatryan et. al. 2002), I will talk about a recent two-loop calculation of the high q2 region. In this context I will present the application of modern techniques to evaluate Feynman integrals.