H. Yuta, University of Rochester Report No. UR-875-271, 1969 (unpublished). 9~ similar calculation performed by F. Bomse and R. Moses, Phys. Rev. 3, 2163 (1968), also predicts a low-mass Kfa enhancement. Also see the analogous work pertaining to the Ai in F. Winkelmann, R. Mickens, and H. J. Lubatti, Nucl. Phys. m, 535 (1971), and in Ref. 3. "'The quantities da/dt jeXp were calculated in the manner described in Ref. 3. "~h e s e values of m a s s and width a r e similar to those which were found to describe the Q + signal produced in 12.7-GeV/c K'p interactions, s e e M. Farber et al., Phys. Rev. D 1, 78 (1970). We have widened the rcE to account for the different widths observed in Fig. 4. When fitting m a s s spectra we use a distorted Breit-Wigner: The simple Breit-Wigner form i s multiplied by the polynomial employed to describe the background.We present results of an energy-dependent phase-shift analysis for aa energies between 550 and 1150 MeV from reactions a+p -n+rr-A++ and a+p -K+K-A++ a t 7.1 GeV/c. The