Comment: Used BR( Y(4S) -> B+ B- ) = BR( Y(4S) -> B0 B0bar ) = 0.5
| Parameter | Measurement |
|---|---|
| \({\cal{B}} ( B^{-} \to \eta_c K^{-} )\) | \([12.9 \pm 0.9\mbox{ (stat)} \pm 1.3\mbox{ (syst)} \pm 3.6\mbox{ (etac br (correlated))}] \times 10^{-4}\) |
| \(\frac{{\cal{B}} ( B^{-} \to \eta_c K^{-} )}{{\cal{B}} ( B^{-} \to J/\psi K^{-} )}\) | \([1.28 \pm 0.10\mbox{ (stat)} \pm 0.38\mbox{ (syst)}]\) |
| \({\cal{B}} ( \bar{B}^{0} \to \eta_c \bar{K}^{0} )\) | \([11.4 \pm 1.5\mbox{ (stat)} \pm 1.2\mbox{ (syst)} \pm 3.2\mbox{ (etac br (correlated))}] \times 10^{-4}\) |
| \(\frac{{\cal{B}} ( \bar{B}^{0} \to \eta_c \bar{K}^{0} )}{{\cal{B}} ( \bar{B}^{0} \to J/\psi \bar{K}^{0} )}\) | \([1.34 \pm 0.19\mbox{ (stat)} \pm 0.13\mbox{ (syst)} \pm 0.38\mbox{ (etac br (correlated))}]\) |
| \(\frac{{\cal{B}} ( \bar{B}^{0} \to \eta_c \bar{K}^{0} )}{{\cal{B}} ( B^{-} \to \eta_c K^{-} )}\) | \([0.87 \pm 0.13\mbox{ (stat)} \pm 0.07\mbox{ (syst)}]\) |