LHCb-PAPER-2015-024

LHCb: INSPIRE

ParameterMeasurement
\(\frac{{\cal{B}} ( B_c^- \to \psi(2S) \pi^- ) } {{\cal{B}} ( B_c^- \to J/\psi \pi^- ) }\)\([0.268 \pm 0.032\mbox{ (stat)} \pm 0.007\mbox{ (syst)} \pm 0.006\mbox{ (R(psi))}]\)