PRL 108, 151801 (2012)

LHCb: INSPIRE

ParameterMeasurement
\(\frac {{\cal{B}} ( \bar{B}^{0}_s \to J/\psi f^\prime_2 )} { {\cal{B}} ( \bar{B}^{0}_s \to J/\psi \phi(1020) )}\)\([2.64 \pm 0.27\mbox{ (stat)} \pm 0.24\mbox{ (syst)}] \times 10^{-1}\)