pizero mass distribution for 3 ring(1mu-like,2e-likes) sample/
ps
The cross(box) shows data(MC).
(total momentum).vs.(total invariant mass) after mupi0 selection
(1kt data)/
ps
The box shows the signal region of p->mupi0 selection @ SK.
00Jan-00Mar data are used here. (~8.9*10**18pot)