Journal of High Energy Physics 07 (2014) 103

LHCb: INSPIRE

ParameterMeasurement
\(\frac{{\cal{B}} ( \Lambda_b^{0} \to J/\psi p \pi^{-} )}{{\cal{B}} ( \Lambda_b^{0} \to J/\psi p K^{-} )}\)\([0.0824 \pm 0.0025\mbox{ (stat)} \pm 0.0042\mbox{ (syst)}]\)