v 1 4 J un 1 99 3 Partially Quenched Gauge Theories and an Application to Staggered Fermions Submitted to Physical Review

Partially quenched gauge theories and an application to staggered fermions.

ar X iv : h ep - l at / 9 60 90 07 v 1 3 1 A ug 1 99 6 1 The Staggered η ′ with Smeared Operators

We present a refined calculation of the η ′ mass using staggered fermions and Wuppertal smeared operators to suppress excited state contributions. We use quenched and dynamical configurations of size 16 3 × 32, with N f = 0, N f = 2 and N f = 4, and compare our results with the expected theoretical forms from quenched, partially quenched, and unquenched chiral perturbation theory.

ar X iv : h ep - l at / 9 90 70 19 v 1 2 3 Ju l 1 99 9 Staggered Fermions and Gauge Field Topology

Based on a large number of smearing steps, we classify SU(3) gauge field configurations in different topological sectors. For each sector we compare the exact analytical predictions for the microscopic Dirac operator spectrum of quenched staggered fermions. In all sectors we find perfect agreement with the predictions for the sector of topological charge zero, showing explicitly that the smalle...

Partially quenched QCD and staggered fermions

We summarize the results of a recent investigation of partially quenched theories [1]. This extends previous work on the fully quenched case [2,3] (see also refs. [4,5]). Partially quenched theories are theories in which not all fermions are quenched; only for k of the n fermions present in the theory will the determinant in the functional integral be replaced by 1. A lagrangian formulation of ...

Universal Scaling of the Chiral Condensate in Finite-Volume Gauge Theories

We confront exact analytical predictions for the finite-volume scaling of the chiral condensate with data from quenched lattice gauge theory simulations. Using staggered fermions in both the fundamental and adjoint representations, and gauge groups SU(2) and SU(3), we are able to test simultaneously all of the three chiral universality classes. With overlap fermions we also test the predictions...