The data sample for 
decays is very limited and it
is obvious that DA
NE will be able to make significant improvements.
The present experimental status is summarized in table 4.2.
Table 4.2: Experimental results for 
decays
A comparison between tables 4.1 and 4.2 shows
the tremendous improvement in statistics to be expected at DA
NE.
We shall come back to the question whether this improvement will
be sufficient to test the standard model at the next-to-leading order,
, in CHPT.