LHCb-PAPER-2015-024
LHCb:
INSPIRE
Parameter
Measurement
\(\frac{{\cal{B}} ( B_c^{-} \to \psi(2S) \pi^{-} ) } {{\cal{B}} ( B_c^{-} \to J/\psi \pi^{-} ) }\)
\([0.268 \pm 0.032\mbox{ (stat)} \pm 0.007\mbox{ (syst)} \pm 0.006\mbox{ (R(psi))}]\)