Figure 5. The plot on the left shows how well the parameter free tree-level ChPT prediction d ChPT (circles; see eq. (2.47)) describes the data obtained from the (cid:12)t ( d (cid:12)t ). As anticipated in section 2.2, the estimate using g A instead of G A (crosses) is not as good. This simply means that at nonzero momentum transfer the coupling of the pion to the nucleon is given by G A ( Q 2 ) instead of g A , as expected. In the plot on the right we show a 0 (cf. eq. (2.38)) obtained from our (cid:12)t to the data. A value of a 0 = 1 would imply that the leading order ChPT estimate for the coupling of N(cid:25) to the three-quark operators is exact and that the operator smearing does not a(cid:11)ect the coupling at all. As one can see, the data is not very sensitive to the value of a 0 . We do not see any signi(cid:12)cant momentum dependence and no strong smearing