B_s decays at Belle

Details B_s decays at Belle B_s decays at Belle

2007-10-08

arxiv.org/abs/0710.1647v1

J.Phys.Conf.Ser.110:052013,2008

Physics

High Energy Physics

High Energy Physics - Experiment

Proceedings of the EPS/HEP 2007 Conference, Manchester, England, July 2007 (on behalf of the Belle collaboration), 3 pages, 2

Scientific paper

10.1088/1742-6596/110/5/052013

We report recent results obtained with the Belle detector using a 23.6 fb^{-1} data sample collected on the Y(5S) resonance at the KEKB asymmetric energy e^+ e^- collider. Inclusive semileptonic B_s^0 -> X^+ l^- \nu decays are studied for the first time and the branching fraction is measured. Combining the electron and muon channels, we obtain Bf(B_s^0 -> X^+ l^- \nu) = (10.2 \pm 0.8 \pm 0.9)%. Also, the radiative penguin decay B_s^0 -> \phi \gamma is observed for the first time, and an improved upper limit for the decay B_s^0 \to \gamma \gamma is obtained.

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