Partial-wave analysis of the (anti K0π-π0) system produced in the Q-mass region in K-p→(anti K0π-π0)p at 10 and 16 GeV/c

A partial-wave analysis has been performed of the diffractively produced low-mass (anti K0π-π0) system in the reaction K-p→(anti K0π-π0)p at 10 and 16 GeV/c. Thus information complementary to that derived from the K-p→(K-π+π-)p channel is obtained. The presence of the Krho decay mode, besides the dominant K*(890)π mode, for the state Jsup(P)=1+ is confirmed. It is also confirmed that for this 1+ state the assumption of factorization of the amplitude into 'production' and 'decay' does not hold: the two decay modes K*π and Krho have different polarisation properties (helicity is approximately conserved in the t-channel for the first, in the s-channel for the second). The assumption that the (anti K0)π-π0 system has isospin I=1/2 has been tested and found to hold. From the cross sections for the various Jsup(P) states, assuming I=1/2, the cross sections for the (K-π+π-) system are predicted and compared with the experimental ones. In general, agreement is found. (Auth.)