The magnetic spectrometer used in R803 (and R413) was used in conjunction with another magnetic spectrometer at a small angle with respect to the ISR beam as shown in figure 1. The combined apparatus measured and indentified two final state charged hadrons. A mass resolution of 10-20 MeV in the invariant mass was abotained.
During the year the analysis of this experiment has been completed. Correlation functions were determined for various combinations of particles. The two-particle invariant mass spectra show no strong structure suggesting the presence of a new narrow resonance. The statistical significance of various enhancements, such as K~p at 2150 MeV and a bump with baryon number 1 at 3510 MeV seen in the data, is not convincing and upper limits on the cross-section times branching ratio for new particle production are given.