%0 Journal Article
%A Güsken, S.
%A Ueberholz, P.
%A Viehoff, J.
%A Eicker, N.
%A Lippert, T.
%A Schilling, K.
%A Spitz, A.
%A Struckmann, T.
%T Flavor singlet axial vector coupling of the proton with dynamical Wilson fermions
%J Physical review / D
%V 59
%N 11
%@ 0556-2821
%C Melville, NY
%I Inst.812068
%M FZJ-2020-03099
%P 114502
%D 1999
%X We present the results of a full QCD lattice calculation of the flavor singlet axial vector coupling G1A of the proton. The simulation has been carried out on a 163×32 lattice at β=5.6 with nf=2 dynamical Wilson fermions. It turns out that the statistical quality of the connected contribution to G1A is excellent, whereas the disconnected part is accessible but suffers from large statistical fluctuations. Using a 1st order tadpole improved renormalization constant ZA, we estimate G1A=0.20(12).
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1103/PhysRevD.59.114502
%U https://juser.fz-juelich.de/record/860318