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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.