LHCb: arXiv:1411.0943
| Parameter | Measurement |
|---|---|
| \( \frac {{\cal{B}} ( \bar{B}^0 \to J/\psi \eta^{\prime })} {{\cal{B}} ( \bar{B}_{s}^0 \to J/\psi \eta^{\prime } )} \) | \([2.28 \pm 0.65\mbox{ (stat)} \pm 0.10\mbox{ (syst)} \pm 0.13\mbox{ (fs/fd)}] \times 10^{-2}\) |
| \( \frac {{\cal{B}} ( \bar{B}^0 \to J/\psi \eta )} {{\cal{B}} ( \bar{B}_{s}^0 \to J/\psi \eta )} \) | \([1.85 \pm 0.61\mbox{ (stat)} \pm 0.09\mbox{ (syst)} \pm 0.11\mbox{ (fs/fd)}] \times 10^{-2}\) |