Search for the decay Bs0 → γγ and a measurement of the branching fraction for Bs0 → φγ
Journal Article
·
· Physical Review. D, Particles, Fields, Gravitation, and Cosmology, 91(1):Article No. 011101(R)
We search for the decay B0s→γγ and measure the branching fraction for B0s→Φγ using 121.4~fb-1 of data collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The B0s→Φγ branching fraction is measured to be (3.6±0.5(stat.)±0.3(syst.)±0.6(fs))×10-5, where fs is the fraction of Bs(*)B¯s(*) in bb¯ events. Our result is in good agreement with the theoretical predictions as well as with a recent measurement from LHCb. We observe no statistically significant signal for the decay B0s→γγ and set a 90% confidence-level upper limit on its branching fraction at 3.1×10-6. This constitutes a significant improvement over the previous result.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1177703
- Report Number(s):
- PNNL-SA-108150; KA2201020
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation, and Cosmology, 91(1):Article No. 011101(R), Journal Name: Physical Review. D, Particles, Fields, Gravitation, and Cosmology, 91(1):Article No. 011101(R)
- Country of Publication:
- United States
- Language:
- English
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