A nonperturbative determination of c_A and the scaling of f_pi and m^{MSbar}
Abstract
We calculate the O(a) improvement coefficient for the axial-vector current using the nonperturbative method proposed by the LANL group. Results for the coefficient in the range \beta=5.93 to 6.2 are presented. We find c_A is close to the 1-loop tadpole-improved perturbative value. In addition, scaling of the pseudoscalar decay constant and renormalised quark mass is improved compared to that obtained using the (larger) c_A values obtained by the ALPHA collaboration.