The reaction"'-+p-+.L\+Ko in the 72-inch hydrogen chamber was used to produce 7220 KO mesons as sociated with a visible decay .L\ ...... p + ". ~. The time dependence and absolute yield of the subsequent strong interactions of KO and KO in hydrogen were used to determine all the parameter s of the neutr al K system, without the assumption of CPT invar-iance or other assumptions about the weak interactions of neutral K' s. From the time distribution of 5gevents of the type K P + p ...... hyperon we find the r;nagnitude of the K;-K L o mas s difference. We then determine the mixing parameter s p, q, p', q' of the neutral K system by means of the time dependence and absolute yield of 11 charge-exchange events,Ko+p ...... K++ n, and the absolute yield of 49 two-body interactions, KO + P ...... hyperon +pion. The results are consistent with CPT invariance and with values of the mixing parameters determined by means of weak interactions.
Eon, A d , and ZO?ro final-state cross sections and AT" and Z0.jro polarizations are obtained in I<-p interactions, for PKin the range 350-430 MeV/c, near the A(1520) resonance Two fits to the partial-wave ainplitudes have been found, both assuming a standard Breit-Wigner amplitude for the A(1520) resonance and a constant-scattering-length 0 3 1 2 isospin-1 amplitude, but differing in their treatment of the S-and P-wave backgrounds. One method used a constant K matrix, the other a momentum-dependent effectiverange expansion for the inverse of the K matrix. From the fitted partial waves, an upper limit oi 10% is set for an isospin mixing between the ArO and ZOno amplitudes. * Present address: Physics Department, Rutgers University, wave analysis, but only to give a satisfactory framework New Brunswick, N. J. t Work performed under the auspices of the U. S. Atomic for the isospin nixing analysis described below. Energy Commission. We have used these fitted amplitudes to place an f Work supported in part by the U. S. Atomic Energy Commission, under Contract No. AT(30-1)-3651, and in part b], a LlPPer limit on isospin lnising in the observed Ano and faculty research grant of the University of hIassachusetts.BOnO amplitudes. Such mixing would reflect a breakdown
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