I=2 pion scattering phase shift with Wilson fermions -: art. no. 014502

被引：80

作者：

Aoki, S ^{[1
]}

Fukugita, M

Hashimoto, S

Ishikawa, KI

Ishizuka, N

Iwasaki, Y

Kanaya, K

Kaneko, T

Kuramashi, Y

Lesk, V

Okawa, M

Taniguchi, Y

Ukawa, A

Yoshié, T

机构：

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

[2] Univ Tokyo, Inst Cosm Ray Res, Tanashi, Tokyo 1888502, Japan

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

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

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

来源：

PHYSICAL REVIEW D | 2003年 / 67卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.67.014502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a lattice QCD calculation of the scattering phase shift for the I=2 S-wave two-pion system using the finite size method proposed by Luscher. We work in the quenched approximation employing the standard plaquette action at beta=5.9 for gluons and the Wilson fermion action for quarks. The phase shift is extracted from the energy eigenvalues of the two-pion system, which are obtained by a diagonalization of the pion four-point function evaluated for a set of relative spatial momenta. In order to change the momentum of the two-pion system, calculations are carried out on 24(3)x60, 32(3)x60, and 48(3)x60 lattices. The phase shift is successfully calculated over the momentum range 0<p(2)<0.3 GeV2.

引用

页数：13

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