LHCb-PAPER-2015-047

Parameter	Measurement
\(\frac{f_{\Xi_b^{-}}}{f_{\Lambda_b^{0}}} \times {\cal{B}} ( \Xi_b^{-} \to \Lambda_b^{0}\pi^{-})\)	\([5.7 \pm 1.8\mbox{ (stat)} ^{+0.8}_{-0.9}\mbox{ (syst)}] \times 10^{-4}\)