The events are available as the acceptance corrected Dalitz plot.

The particles are counted as 1- pi+, 2 – pi0, 3 – pi- and the data are given as:

679

s12 s23 s13 Fraction_of_cell_area Events Error Number of cells

s12 s23 s13 Fraction_of_cell_area Events Error Number of cells

……………..

Only half of the Daltz plot with 679 cells is given. If the number of cells =2, then the cell should be taken twice with permutation of pions. If the number of cells=1, the cell is on the diagonal and must be taken only once.

The s12, s23 and s13 are invariant energies squared of the two meson system (MeV²)

and the fraction_of_cell_area is the ratio of cell area to the area of the largest cell.

For these data, the fraction_of_cell_area=1: all cells at the boundary are removed.

The background level for these events is less than 1%.

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