Observation of Bs0→φγ and Search for Bs0→γγ Decays at Belle
Abstract
We search for the radiative penguin decays Bs0→ϕγ and Bs0→γγ in a 23.6fb-1 data sample collected at the Υ(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 Bs0 meson in the Bs0→ϕγ mode and we measure B(Bs0→ϕγ)=(57-15+18(stat)-11+12(syst))×10-6. No significant Bs0→γγ signal is observed and we set a 90% confidence level upper limit of B(Bs0→γγ)<8.7×10-6.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2008
- DOI:
- 10.1103/PhysRevLett.100.121801
- arXiv:
- arXiv:0712.2659
- Bibcode:
- 2008PhRvL.100l1801W
- Keywords:
-
- 13.20.He;
- 14.40.Nd;
- Decays of bottom mesons;
- Bottom mesons;
- High Energy Physics - Experiment
- E-Print:
- 5 pages, 3 figures, accepted by Physics Review Letters