First observation of $\gamma \gamma \to p\bar{p}{K}^{+}{K}^{-}$ and search for exotic baryons in $pK$ systems

Belle Collaboration, C. P. Shen, C. Z. Yuan +177

The process $\gamma \gamma \to p\bar{p}{K}^{+}{K}^{-}$ and its intermediate processes are measured for the first time using a 980~fb${}^{-1}$ data sample collected with the Belle detector at the KEKB…