Precise determination of the I=2 ππ scattering length from mixed-action lattice QCD

被引：94

作者：

Beane, Silas R. ^{[1
]}

Luu, Thomas C. ^{[2
]}

Orginos, Kostas ^{[3
,4
]}

Parreno, Assumpta ^{[5
,6
]}

Savage, Martin J. ^{[7
]}

Torok, Aaron ^{[1
]}

Walker-Loud, Andre ^{[8
]}

机构：

[1] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA

[2] Lawrence Livermore Natl Lab, N Div, Livermore, CA 94551 USA

[3] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

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

[5] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[6] Univ Barcelona, Inst Ciencies Cosmos, E-08028 Barcelona, Spain

[7] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[8] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.77.014505

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The I = 2 pi pi scattering length is calculated in fully dynamical lattice QCD with domain-wall valence quarks on the asqtad-improved coarse MILC configurations (with fourth-rooted staggered sea quarks) at four light-quark masses. Two- and three-flavor mixed-action chiral perturbation theory at next-to-leading order is used to perform the chiral and continuum extrapolations. At the physical charged pion mass, we find m(pi)a(pi pi)(I=2) = -0.043 30 +/- 0.000 42, where the error bar combines the statistical and systematic uncertainties in quadrature.

引用

页数：12

共 87 条

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