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The channel pi(1800) to omega pi pi

One of the problems performing a PWA of a system with neutral mesons decaying into tex2html_wrap_inline2248 's is the combinatorial background. This background strongly depends on the resolution of the electromagnetic calorimeter. In COMPASS we expect a higher resolution with increasing energy and thus will benefit in the signal/background ratio, in particular in the tex2html_wrap_inline2866 tex2html_wrap_inline2922 tex2html_wrap_inline2924 system. Also important are statistical limitations. For this specific channel it prevented to measure the phase of the tex2html_wrap_inline2926 wave with respect to the less intensive reference wave.

Lars Schmitt
Wed May 22 16:44:09 METDST 1996