Charmonium spectrum from quenched QCD with overlap fermions

被引：3

作者：

Tamhankar, S. ^{[1
]}

Alexandru, A.

Chen, Y.

Dong, S. J.

Draper, T.

Horvath, I.

Lee, F. X.

Liu, K. F.

Mathur, N.

Zhang, J. B.

机构：

[1] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[2] Hamline Univ, Dept Phys, St Paul, MN 55104 USA

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

[4] George Washington Univ, Washington, DC 20052 USA

[5] Jefferson Lab, Newport News, VA 23606 USA

[6] Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China

[7] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China

[8] Univ Adelaide, CSSM, Adelaide, SA 5005, Australia

[9] Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia

来源：

PHYSICS LETTERS B | 2006年 / 638卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.physletb.2006.04.055

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first study of the charmonium spectrum using overlap fermions, on quenched configurations. Simulations are performed on 16(3) x 72 lattices, with Wilson gauge action beta = 6.3345. We demonstrate that we have discretization errors, as indicated by the dispersion relation, at about 5%. We obtain 88(4) MeV for the IS hyperfine splitting using the r(0) scale, and 121(6) MeV using the (1 (P) over bar -1 (S) over bar) scale. This Letter should encourage the pursuit of using the same chiral fermions for both heavy and light quarks on the same lattice. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：55 / 60

页数：6

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