Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 15: Flavourphysik (Theorie) I

T 15.9: Vortrag

Mittwoch, 17. März 2010, 16:00–16:15, HG XIII

Electroweak penguins in isospin-violating B_s decays — Lars Hofer¹, •Dominik Scherer¹, and Leonardo Vernazza² — ¹Karlsruher Institut für Technologie — ²Johannes-Gutenberg-Universität Mainz

During the last decade, experimental data from B → K π decays has caused many discussions about deviations from Standard Model predictions and their possible explanation by New Physics. In particular, models which allow for enhanced electroweak penguins have been investigated in this context since they allow for sizeable isospin-violating effects.

We study the consequences of such enhanced electroweak penguins in the purely isospin-violating decays B_s → φ π and B_s → φ ρ. The branching fractions of these modes are highly sensitive to New Physics in EW penguins and are thus an interesting topic for LHCb and Super-B-factories, complementary to precise B → K π measurements.