1999
DOI: 10.1103/physrevd.60.114508
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Comparative study of the full QCD hadron spectrum and the static quark potential with improved actions

Abstract: We investigate the effects of action improvement on the light hadron spectrum and the static quark potential in two-flavor QCD for a Ϫ1 Ϸ1 GeV and m PS /m V ϭ0.7-0.9. We compare a renormalization group improved action with the plaquette action for gluons and the SW-clover action with the Wilson action for quarks. We find a significant improvement in the hadron spectrum by improving the quark action, while the gluon improvement is crucial for a rotationally invariant static potential. We also explore the region… Show more

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Cited by 55 publications
(3 citation statements)
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“…Terms of higher order produced by the formalism are not necessarily correct[27], although at least they will respect unitarity and the correct analytic structure of the amplitude 4. Let us nevertheless remark that there are other lattice calculations which are not quite compatible with these three because their masses fall systematically either above[54] or below[58] them. The ones falling below are somewhat harder to accommodate within the IAM, as explained in Ref [25]…”
mentioning
confidence: 95%
“…Terms of higher order produced by the formalism are not necessarily correct[27], although at least they will respect unitarity and the correct analytic structure of the amplitude 4. Let us nevertheless remark that there are other lattice calculations which are not quite compatible with these three because their masses fall systematically either above[54] or below[58] them. The ones falling below are somewhat harder to accommodate within the IAM, as explained in Ref [25]…”
mentioning
confidence: 95%
“…We have seen the difficulty in fitting the Coulomb term parameter, α, in our ansatz to a wide range of values on the dynamical ensembles. At the shortest distances, there is a well-known difficulty associated with fitting α for both the original and vortex-removed ensembles [42], stemming from the small statistical errors present at short range coupled with the presence of finite latticespacing systematics.…”
Section: B Modified Coulomb Potential Fitsmentioning
confidence: 99%
“…For our calculations we use dynamical clover-Wilson lattices provided by the CP-PACS collaboration [6], [7], [8] and the Chroma Software Library [9], [10] (including BAGEL [11]). The parameters of the gauge configurations are collected in Table 1.…”
Section: Technical Detailsmentioning
confidence: 99%