LHCb: INSPIRE
| Parameter | Measurement |
|---|---|
| \(\frac{{\sigma(B_c^{-}) \times \cal{B}} ( B_c^{-} \to J/\psi \pi^{-} )} {\sigma(B^{-}) \times {\cal{B}} ( B^{-} \to J/\psi K^{-} )}\) | \([0.68 \pm 0.10\mbox{ (stat)} \pm 0.03\mbox{ (syst)} \pm 0.05\mbox{ (lifetime)}] \times 10^{-2}\) |