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Non-perturbative O(a)-improvement of Wilson quark action in three-flavor QCD with plaquette gauge action | | CP-PACS
; JLQCD Collaborations: N.Yamada
; S.Aoki
; M.Fukugita
; S.Hashimoto
; K-I.Ishikawa
; N.Ishizuka
; Y.Iwasaki
; K.Kanaya
; T.Kaneko
; Y.Kuramashi
; M.Okawa
; Y.Taniguchi
; N.Tsutsui
; A.Ukawa
; T.Yoshie
; | | Date: |
17 Jun 2004 | | Journal: | Phys.Rev. D71 (2005) 054505 | | Subject: | hep-lat | | Abstract: | We perform a non-perturbative determination of the O(a)-improvement coefficient c_SW for the Wilson quark action in three-flavor QCD with the plaquette gauge action. Numerical simulations are carried out in a range of eta=12.0-5.2 on a single lattice size of 8^3x16 employing the Schrödinger functional setup of lattice QCD. As our main result, we obtain an interpolation formula for c_SW and the critical hopping parameter K_c as a function of the bare coupling. This enables us to remove O(a) scaling violation from physical observables in future numerical simulation in the wide range of eta. Our analysis with a perturbatively modified improvement condition for c_SW suggests that finite volume effects in c_SW are not large on the 8^3x16 lattice. We investigate N_f dependence of c_SW by additional simulations for N_f=4, 2 and 0 at eta=9.6. As a preparatory step for this study, we also determine c_SW in two-flavor QCD at eta=5.2. At this eta, several groups carried out large-scale calculations of the hadron spectrum, while no systematic determination of c_SW has been performed. | | Source: | arXiv, hep-lat/0406028 | | Services: | Forum | Review | PDF | Favorites | |
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