Improved lattice fermion action for heavy quarks

被引：9

作者：

Cho, Yong-Gwi ^{[1
]}

Hashimoto, Shoji ^{[2
,3
]}

Juettner, Andreas ^{[4
]}

Kaneko, Takashi ^{[2
,3
]}

Marinkovic, Marina ^{[4
,5
]}

Noaki, Jun-Ichi ^{[2
]}

Tsang, Justus Tobias ^{[4
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

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

[3] Grad Univ Adv Studies Sokendai, Sch High Energy Accelerator Sci, Tsukuba, Ibaraki 3050801, Japan

[4] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[5] CERN, Dept Phys, CH-1211 Geneva 23, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 05期

基金：

欧洲研究理事会;

关键词：

Lattice QCD; Heavy Quark Physics; EXACTLY MASSLESS QUARKS; CONTINUUM-LIMIT;

D O I：

10.1007/JHEP05(2015)072

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 develop an improved lattice action for heavy quarks based on Brillouin-type fermions, that have excellent energy-momentum dispersion relation. The leading discretization errors of O(a) and O(a(2)) are eliminated at tree-level. We carry out a scaling study of this improved Brillouin fermion action on quenched lattices by calculating the charmonium energy-momentum dispersion relation and hyperfine splitting. We present a comparison to standard Wilson fermions and domain-wall fermions.

引用

页数：32