PRL 98,131803 (2007)

Belle: INSPIRE

ParameterMeasurement
\({\cal{B}} ( \bar{B}^0 \to J/\psi(1S) \eta )\)\([9.6 \pm 1.7\mbox{ (stat)} \pm 0.7\mbox{ (syst)}] \times 10^{-6}\) (superseded)