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HK: Physik der Hadronen und Kerne

HK 11: Poster Session: Electromagnetic and Hadronic Probes

HK 11.39: Poster

Dienstag, 9. März 2004, 13:30–15:30, Foyer

Search for Rare Charmless Hadronic B Meson Decays — •Stephan Otto — Institute of Nuclear and Particle Physics, TU Dresden, 01062 Dresden

Since 1999, the BABAR B meson factory at the asymmetric electron-positron collider PEP-II at the Stanford Linear Accelerator Center has collected more than 140×10⁶ BB meson pairs. This amount of data enables us to investigate B meson decays with expected branching fractions even smaller than 10⁻⁶. Of particular interest are b→ d and b→ s quark transitions, exclusively described by “penguin” topology diagrams, which have strong impact on CP asymmetries and are also sensitive to new physics. We present a search for resulting decays such as B⁰→φη, B⁰→φπ⁰, B⁰→φρ⁰ and B⁰→φω, based on a data sample of 80 fb⁻¹ and applying a “blinded” analysis strategy.