CCAST WORLD LAB,CTR THEORET PHYS,BEIJING,PEOPLES R CHINA
; INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA
In detail we analyse possible ways for measuring the hidden phase in DELTA-S = 1 weak radiative decays of hyperons and have found that any measurement on the kinematic quantities of the decays cannot determine the phase. The only possibility is to measure the CP non-invariance in decays, even though it is very difficult. Our analysis is fully model-independent.