- 著者
 
          - 
             
             Yamada N.
             
             Aoki S.
             
             Fukugita M.
             
             Hashimoto S.
             
             Ishikawa K-I.
             
             Ishizuka N.
             
             Iwasaki Y.
             
             Kanaya K.
             
             Kaneko T.
             
             Kuramashi Y.
             
             Okawa M.
             
             Taniguchi Y.
             
             Tsutsui N.
             
             Ukawa A.
             
             Yoshié T.
             
          
 
          
          
          - 出版者
 
          - American Physical Society
 
          
          
          - 雑誌
 
          - Physical review D (ISSN:15507998)
 
          
          
          - 巻号頁・発行日
 
          - vol.71, no.5, pp.054505, 2005-03 
 
          
          
          
          - 被引用文献数
 
          - 
             
             
             16
             
             
             19
 
             
          
        
        
        
        We perform a nonperturbative determination of the O(a)-improvement coefficient cSW for the Wilson quark action in three-flavor QCD with the plaquette gauge action. Numerical simulations are carried out in a range of beta=12.0–5.2 on a single lattice size of 83×16 employing the Schrödinger functional setup of lattice QCD. As our main result, we obtain an interpolation formula for cSW and the critical hopping parameter Kc as a function of the bare coupling. This enables us to remove the O(a) scaling violation from physical observables in future numerical simulation in the wide range of beta. Our analysis with a perturbatively modified improvement condition for cSW suggests that finite volume effects in cSW are not large on the 83×16 lattice. We investigate Nf dependence of cSW by additional simulations for Nf=4, 2, and 0 at beta=9.6. As a preparatory step for this study, we also determine cSW in two-flavor QCD at beta=5.2. At this beta, several groups have carried out large-scale calculations of the hadron spectrum, while no systematic determination of cSW has been performed.