H. Yuta, University of Rochester Report No. UR-875-271, 1969 (unpublished). 9~ similar calculation performed by F. Bomse and R. Moses, Phys.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

An analysis has been made of 64600 events of the type K p + K p-0 and 22 800 events of the type K p + K n in the Berkeley 25-inch hydrogen bubble chamber. Differential cross sections have been measured in intervals of 10 MeV/c over the momentum range 220 to 470 MeV/c. Legendre polynomial fits to the distributions have been made,and the coefficients show structure from the resonant D-wave A(1520) and background Sand P-waves. No new structure is observed. The total K-p cross section determined from measurements of all final states seen in this exposure is also presented. 'I

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