Freiburg 2008 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 13: Flavorphysik (Theorie) I

T 13.4: Vortrag

Mittwoch, 5. März 2008, 17:30–17:45, KGI-HS 1132

Is there a non-Standard-Model contribution in non-leptonic b→ s decays? — Thorsten Feldmann^1,2, •Martin Jung¹, and Thomas Mannel¹ — ¹Fachbereich Physik, Universität Siegen, Germany — ²Physik Department, Technische Universität München, Germany

Precision measurements of branching fractions and CP asymmetries in non-leptonic b→ s decays reveal certain ”puzzles“ when compared with the Standard Model expectations based on a global fit of the CKM triangle and general theoretical expectations. Without reference to a particular model, we investigate to what extent these discrepancies observed in B→ J/ψ K, B→φ K and B→ Kπ may point towards new physics in b→ sqq operators. In particular, we compare on a quantitative level the relative impact of different quark flavours q = c,s,u,d .