Zusammenfassung
We search for the radiative penguin decays B\_s to phi gamma and B\_s to gamma
gamma in a 23.6 fb-1 data sample collected at the Upsilon(5S) resonance with
the Belle detector at the KEKB e+e- asymmetric-energy collider. We observe for
the first time a radiative penguin decay of the B\_s meson in the B\_s to phi
gamma mode. No significant B\_s to gamma gamma signal is observed.
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