Exploring QCD at small sea quark masses with improved Wilson-type quarks

被引：3

作者：

Namekawa, Y ^{[1
]}

Aoki, S

Fukugita, M

Ishikawa, KI

Ishizuka, N

Iwasaki, Y

Kanaya, K

Kaneko, T

Kuramashi, Y

Lesk, VI

Okawa, M

Taniguchi, Y

Ukawa, A

Umeda, T

Yoshié, T

机构：

[1] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan

[2] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan

[3] Univ Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058577, Japan

[4] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[5] Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2003年 / 119卷

关键词：

D O I：

10.1016/S0920-5632(03)01540-8

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We explore the region of small sea quark masses below m(PS)/m(V) 0.5 in two-flavor QCD using a mean-field improved clover quark action and an RG-improved gauge action at a similar or equal to 0.2 fm on 12(3) x 24 and 16(3) x 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 employs L-th minimal residual polynomials with a dynamical selection of L. We also find singular spikes of DeltaH in the HMC algorithm at moderate values of Deltatau. Nature of the spike is studied. We also study finite-size effects and chiral properties of meson masses.

引用

页码：335 / 337

页数：3

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