Ground-state energy of dilute neutron matter at next-to-leading order in lattice chiral effective field theory

被引：81

作者：

Epelbaum, E. ^{[1
,2
,3
,4
]}

Krebs, H. ^{[1
,2
,3
,4
]}

Lee, D. ^{[3
,4
,5
]}

Meissner, U. -G. ^{[1
,2
,3
,4
]}

机构：

[1] Forschungszentrum Julich, Inst Kernphys IKP 3, D-52425 Julich, Germany

[2] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

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

[4] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

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

来源：

EUROPEAN PHYSICAL JOURNAL A | 2009年 / 40卷 / 02期

关键词：

NUCLEON-NUCLEON-SCATTERING; CONTINUUM-LIMIT; PHASE-SHIFTS; LAGRANGIANS; FORCES; SYMMETRY; SYSTEMS; MODEL;

D O I：

10.1140/epja/i2009-10755-0

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 present lattice calculations for the ground-state energy of dilute neutron matter at next-to-leading order in chiral effective field theory. This study follows a series of recent papers on low-energy nuclear physics using chiral effective field theory on the lattice. In this work we introduce an improved spin- and isospin-projected leading-order action which allows for a perturbative treatment of corrections at next-to-leading order and smaller estimated errors. Using auxiliary fields and Euclidean-time projection Monte Carlo, we compute the ground state of 8, 12, and 16 neutrons in a periodic cube, covering a density range from 2% to 10% of normal nuclear density.

引用

页码：199 / 213

页数：15

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