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Mainz 2004 – scientific programme

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T: Teilchenphysik

T 504: Schwere Quarks V

T 504.4: Talk

Wednesday, March 31, 2004, 17:00–17:15, HS V

Measurement of Branching Fractions of Color-Suppressed Decays of the B0 Meson to D(∗)0π0, D(∗)0η, D(∗)0 ω, and D0 η — •Ullrich Schwanke1,2, A. Hicheur3, H. Paar1, and V. Tisserand31UC San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0319, USA — 2Now at: Humboldt University, Newtonstrasse 15, 12489 Berlin, Germany — 3Laboratoire de Physique des Particules, F-74941, Annecy-le-Vieux, France

Using a sample of 88.8 × 106 BB events collected with the BaBar detector at the PEP-II storage rings at the Stanford Linear Accelerator Center, we have measured the branching fractions of seven color-suppressed B-meson decays. The branching fractions for B0D∗ 0η, D∗ 0ω, and D0 η were detected for the first time with more than five-sigma statistical significance. We also set an upper limit on the branching fraction for the D∗ 0 η decay. All of these branching fractions are significantly larger than theoretical expectations based on the “naive” factorization model.

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