Observation of the $Y(4140)$ structure in the $J/\psi \varphi$ Mass Spectrum in $B^{\pm }\to J/\psi \varphi K$ cays

The CDF Collaboration

The observation of the $Y(4140)$ structure in $B^{\pm }\to J/\psi \varphi K^{\pm }$ decays produced in $\bar{p}p$ collisions at $\sqrt{s}=1.96~\TeV$ is reported with a statistical signi…