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- W1978381707 abstract "Langevin simulation of quantum chromodynamics (QCD) on a lattice is carried out fully taking into account the effect of the quark vacuum polarization. It is shown that the Langevin method works well for full QCD and that simulation on a large lattice is practically feasible. A careful study is made of systematic errors arising from a finite Langevin time-step size. The magnitude of the error is found to be significant for light quarks, but the well-controlled extrapolation allows a separation of the values at the vanishing time-step size. As another important ingredient for the feasibility of Langevin simulation the advantage of the matrix inversion algorithm of the preconditioned conjugate residual method is described, as compared with various other algorithms. The results of a hadron-mass-spectrum calculation on a ${9}^{3}$ifmmodetimeselsetexttimesfi{}18 lattice at ensuremath{beta}=5.5 with the Wilson quark action having two flavors are presented. It is shown that the contribution of vacuum quark loops significantly modifies the hadron masses in lattice units, but that the dominant part can be absorbed into a shift of the gauge coupling constant at least for the ground-state hadrons. Some suggestion is also presented for the physical effect of vacuum quark loops for excited hadrons." @default.
- W1978381707 created "2016-06-24" @default.
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- W1978381707 date "1987-08-01" @default.
- W1978381707 modified "2023-09-27" @default.
- W1978381707 title "Langevin simulation of the full QCD hadron mass spectrum on a lattice" @default.
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- W1978381707 doi "https://doi.org/10.1103/physrevd.36.824" @default.
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