Evidence for a new resonance and search for the Y(4140) in $\gamma \gamma \to \varphi J/\psi$

The Belle Collaboration, C. P. Shen

The process $γγ\to ϕ\jpsi$ is measured for $ϕ\jpsi$ masses between threshold and 5 GeV/$c^2$, using a data sample of 825 fb${}^{-1}$ collected with the Belle detector. A narrow…