Observation of B -> K eta gamma

Details Observation of B -> K eta gamma Observation of B -> K eta gamma

2004-08-24

arxiv.org/abs/hep-ex/0408120v1

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 2 figures, submitted to ICHEP2004, Beijing, China

Scientific paper

We report measurements of radiative B decays with K eta gamma final states, using a data sample of 140 /fb recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- asymmetric energy collider. We observe B -> K eta gamma for the first time with a branching fraction of (6.9 +1.7-1.6 (stat) +1.3-1.0 (syst)) X 10^{-6} for M(Keta) < 2.4 GeV/c2. We also set an upper limit on B -> K3*(1780) gamma.

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