Possible Experimental Consequences of Triangle Singularities in Strange-Particle Production Processes

Observable consequences of anomalous threshold singularity for triangle diagrams are examined with special reference to cases where baryon resonances of narrow width participate as an internal line in the $E$ channel. It is found that the reaction $K^{-}+p\to K+\pi +\Xi$, with ${\Xi }^{*}$ (1530) included as an internal line of the graph, offers the best experimental situation for detecting an anomalous singularity effect by studying the ($K\pi$) mass spectrum in final state.