Chiral effective field theory on the lattice at next-to-leading order

被引：28

作者：

Borasoy, B. ^{[1
]}

Epelbaum, E. ^{[1
,2
]}

Krebs, H. ^{[1
,2
]}

Lee, D. ^{[1
,3
]}

Meissner, U.-G. ^{[1
,2
]}

机构：

[1] Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany

[2] Forschungszentrum Julich, Inst Kernphys Theorie, D-52425 Julich, Germany

[3] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

来源：

EUROPEAN PHYSICAL JOURNAL A | 2008年 / 35卷 / 03期

关键词：

D O I：

10.1140/epja/i2008-10544-3

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We study nucleon-nucleon scattering on the lattice at next-to-leading order in chiral effective field theory. We determine phase shifts and mixing angles from the properties of two-nucleon standing waves induced by a hard spherical wall in the center-of-mass frame. At fixed lattice spacing we test model independence of the low-energy effective theory by computing next-to-leading-order corrections for two different leading-order lattice actions. The first leading-order action includes instantaneous one-pion exchange and same-site contact interactions. The second leading-order action includes instantaneous one-pion exchange and Gaussian-smeared interactions. We find that in each case the results at next-to-leading order are accurate up to corrections expected at higher order.

引用

页码：343 / 355

页数：13