Title

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

Abstract

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.

Department

Physics

Publication Date

1-18-2008

Journal Title

Physical Review D

Publisher

AMERICAN PHYSICAL SOCIETY

Digital Object Identifier (DOI)

10.1103/PhysRevD.77.014505

Document Type

Article

Rights

© 2008 The American Physical Society

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