Measurement of the branching fraction of the decay at Belle II
Journal Article
·
· Physical Review. D.
We measure the branching fraction of the decay using data collected with the Belle II detector. The data contain 387 million pairs produced in collisions at the resonance. We reconstruct decays from an analysis of the distributions of the energy and the helicity angle. We determine the branching fraction to be , in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two. Published by the American Physical Society 2024
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC06-76RL01830; AC06-76RL01830
- OSTI ID:
- 2376261
- Journal Information:
- Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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