Observation of the decay B0J/ψωB^0 \to J/\psi \omega at Belle II

Collaboration
Dec 16, 2024
8 pages
e-Print:
Report number:
  • Belle II preprint: 2024-021,
  • KEK preprint: 2024-18
Experiments:

Citations per year

0 Citations
Abstract: (arXiv)
We measure the branching fraction of the decay B0J/ψωB^0 \to J/\psi \omega using data collected with the Belle II detector at the SuperKEKB collider. The data contain (387±6)×106(387 \pm 6) \times 10^6 BBB\overline{B} meson pairs produced in energy-asymmetric e+ee^+e^- collisions at the Υ(4S)\Upsilon (4S) resonance. The measured branching fraction B(B0J/ψω)=(2.16±0.30±0.14)×105\mathcal{B}(B^0 \to J/\psi \omega) = \left( 2.16 \pm 0.30 \pm 0.14 \right) \times 10^{-5}, where the first uncertainty is statistical and the second is systematic, is more precise than previous results and constitutes the first observation of the decay with a significance of 6.56.5 standard deviations.
Loading ...