Observation of B+ -> K+ eta gamma

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

2004-11-21

arxiv.org/abs/hep-ex/0411065v2

Phys.Lett.B610:23-30,2005

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 5 figures, accepted by Phys. Lett. B

Scientific paper

10.1016/j.physletb.2005.01.097

We report measurements of radiative B decays with K eta gamma final states, using a data sample of 253 /fb recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- storage ring. We observe B+ -> K+ eta gamma for the first time with a branching fraction of (8.4 +- 1.5(stat) +1.2 -0.9(syst)) X 10^{-6} for M(Keta) < 2.4 GeV/c^2, and find evidence of B0 -> K0 eta gamma. We also search for B -> K3*(1780) gamma.

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