Study of pentaquarks on the lattice with overlap fermions -: art. no. 074508

被引：85

作者：

Mathur, N ^{[1
]}

Lee, FX

Alexandru, A

Bennhold, C

Chen, Y

Dong, SJ

Draper, T

Horváth, I

Liu, KF

Tamhankar, S

Zhang, JB

机构：

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

[2] George Washington Univ, Dept Phys, Ctr Nucl Studies, Washington, DC 20052 USA

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

[4] Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China

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

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

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.70.074508

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a quenched lattice QCD calculation of spin-1/2 five-quark states with uudd (s) over bar quark content for both positive and negative parities. We do not observe any bound pentaquark state in these channels for either I=0 or I=1. The states we found are consistent with KN scattering states which are checked to exhibit the expected volume dependence of the spectral weight. The results are based on overlap-fermion propagators on two lattices, 12(3)x28 and 16(3)x28, with the same lattice spacing of 0.2 fm, and pion mass as low as similar to180 MeV.

引用

页数：11

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