Speaker
Mr
Christian Wittemeier
(Westfälische Wilhelms-Universität Münster)
Description
We report on a non-perturbative computation of the renormalization factor Z_A of the axial vector current in three-flavour O(a) improved lattice QCD with Wilson quarks and tree-level Symanzik improved gauge action. Our normalization condition is formulated at constant physics in the same Schrödinger functional setup as is being used for the determination of the improvement coefficient c_A. It exploits the full, massive axial Ward identity to reduce finite quark mass effects in the evaluation of Z_A and correlators with boundary wave functions to suppress excited state contributions in the pseudoscalar channel.
Primary authors
Mr
Christian Wittemeier
(Westfälische Wilhelms-Universität Münster)
Dr
Jochen Heitger
(University of Muenster)
Dr
John Bulava
(Trinity College Dublin)
Dr
Michele Della Morte
(University of Southern Denmark, Odense)
