Observation of an Exotic $S=+1$ Baryon in Exclusive Photoproduction from the Deuteron

S. Stepanyan, The CLAS collaboration

In an exclusive measurement of the reaction $\gamma d\to K^{+}{K}^{-}pn$, a narrow peak that can be attributed to an exotic baryon with strangeness $S=+1$ is seen in the $K^{+}n$ invariant m…