Improving Stochastic Estimator Techniques for Disconnected Diagrams

J. Viehoff; N. Eicker; S. Guesken; H. Hoeber; P. Lacock; Th. Lippert; G. Ritzenhoefer; K. Schilling; A. Spitz; P. Ueberholz

doi:10.1016/S0920-5632(97)00742-1

paper

Improving Stochastic Estimator Techniques for Disconnected Diagrams

arXiv:hep-lat/9710050 · doi:10.1016/S0920-5632(97)00742-1

Abstract

Disconnected diagrams are expected to be sensitive to the inclusion of dynamical fermions. We present a feasibility study for the observation of such effects on the nucleonic matrix elements of the axial vector current, using SESAM full QCD vacuum configurations with Wilson fermions on $1 6^{3} \times 32$ lattices, at $β = 5.6$ . Starting from the standard methods developed by the Kentucky and Tsukuba groups, we investigate the improvement from various refinements thereof.

One author added. Contribution to Lattice 1997, 3 pages LaTex, to appear in Nucl. Phys. B (Proc. Suppl.)