Non-perturbative improvement of the axial current with three dynamical flavors and the Iwasaki gauge action
arXiv:hep-lat/0703006 · doi:10.1088/1126-6708/2007/04/092
Abstract
We perform a non-perturbative determination of the improvement coefficient c_A to remove O(a) discretization errors in the axial vector current in three-flavor lattice QCD with the Iwasaki gauge action and the standard O$(a)$-improved Wilson quark action. An improvement condition with a good sensitivity to c_A is imposed at constant physics. Combining our results with the perturbative expansion, c_A is now known rather precisely for 1/a \gtrsim 1.6 GeV.
13 pages, 3 figures, 4 tables