Exploring QCD at small sea quark masses with improved Wilson-type quarks
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概要
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We explore the region of small sea quark masses belowmps/mv= 0.5 in two-flavor QCD using a mean-field improved clover quark action and an RG-improved gauge action ata 0.2 fm on 123 × 24 and 163 × 24 lattices. We find that instability of the standard BiCGStab algorithm at small quark masses can be mostly removed by the BiCGStab(DS-L) algorithm, which employsL-th minimal residual polynomials with a dynamical selection ofL. We also find singular spikes of ΔH in the HMC algorithm at moderate values of Δτ. Nature of the spike is studied. We also study finite-size effects and chiral properties of meson masses.
- Elsevier Science B.V.の論文
- 2003-00-00
Elsevier Science B.V. | 論文
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