QCD with light Wilson quarks on fine lattices (I):: first experiences and physics results

被引：72

作者：

Del Debbio, Luigi ^{[1
]}

Giusti, Leonardo

Luescher, Martin

Petronzio, Roberto

Tantalo, Nazario

机构：

[1] Univ Edinburgh, SUPA, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] CERN, Dept Phys, TH Div, CH-1211 Geneva 23, Switzerland

[3] Univ Roma Tor Vergata, I-00133 Rome, Italy

[4] Ist Nazl Fis Nucl, Sez Tor Vergata, I-00133 Rome, Italy

[5] Ctr Enrico Fermi, I-00184 Rome, Italy

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 02期

关键词：

lattice QCD; chiral lagrangians;

D O I：

10.1088/1126-6708/2007/02/056

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：

Recent conceptual, algorithmic and technical advances allow numerical simulations of lattice QCD with Wilson quarks to be performed at significantly smaller quark masses than was possible before. Here we report on simulations of two-flavour QCD at sea-quark masses from slightly above to approximately 1/4 of the strange-quark mass, on lattices with up to 64 x 323 points and spacings from 0.05 to 0.08 fm. Physical sea-quark effects are clearly seen on these lattices, while the lattice effects appear to be quite small, even without O(a) improvement. A striking result is that the dependence of the pion mass on the sea-quark mass is accurately described by leading-order chiral perturbation theory up to meson masses of about 500 MeV.

引用

页数：15

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