TL;DR
This paper reports on searches for rare radiative penguin decays of the Bs meson into phi gamma and gamma gamma using data collected at the Belle experiment, aiming to observe or set limits on these processes.
Contribution
First search for Bs radiative penguin decays at Belle, providing experimental constraints on these rare processes.
Findings
No significant signals observed for Bs to phi gamma or gamma gamma decays.
Set upper limits on branching fractions for these decays.
Results contribute to understanding flavor-changing neutral currents in Bs decays.
Abstract
We report searches for the radiative penguin decays Bs to phi gamma and Bs to gamma gamma based on a 23.6 fb-1 data sample collected with the Belle detector at the KEKB e+e- energy-asymmetric collider operating at the Upsilon(5S) resonance.
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