Flavor singlet axial vector coupling of the proton with dynamical Wilson fermions -: art. no. 114502.

被引：43

作者：

Güsken, S

Ueberholz, P

Viehoff, J

Eicker, N

Lippert, T

Schilling, K

Spitz, A

Struckmann, T

机构：

[1] Berg Univ Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany

[2] NIC Forschungszentrum Julich, D-52425 Julich, Germany

[3] DESY, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW D | 1999年 / 59卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.59.114502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a full QCD lattice calculation of the flavor singlet axial vector coupling G(A)(1) of the proton. The simulation has been carried out on a 16(3)X32 lattice at beta=5.6 with n(f)=2 dynamical Wilson fermions. It turns out that the statistical quality of the connected contribution to G(A)(1) is excellent, whereas the disconnected part is accessible but suffers from large statistical fluctuations. Using a 1st order tadpole improved renormalization constant Z(A), we estimate G(A)(1)=0.20(12). [S0556-2821(99)04811-0].

引用

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