CORRELATION OF FINAL-STATE INTERACTION WITH THE DETECTION PHASE-SPACE

The final state interaction between the emitting particles has been ex pected to play an important role to discriminate the signal and backgr ound channels in the experiment which detects low mass dibaryon. Theor etically this effect is shown most clearly in the invariant mass spect rum which displays a narrow peak for the dibaryon decaying particles a nd a hat distribution for the background particles. Put our detailed s imulation study indicates that the detection phase space will largely change the shape of the spectra. The calculation for TRIUMF-E772, whic h is designed to search for d dibaryon, shows that the spectra of sig nal and background become similar to each other and therefore the disc rimination is certainly ineffective.