Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-06-20
Phys.Rev.D77:014505,2008
Physics
High Energy Physics
High Energy Physics - Lattice
20 pages, 7 figures
Scientific paper
10.1103/PhysRevD.77.014505
The I=2 pipi 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_pipi(I=2) = -0.04330 +- 0.00042, where the error bar combines the statistical and systematic uncertainties in quadrature.
Beane Silas R.
Luu Thomas C.
Orginos Kostas
Parreno Assumpta
Savage Martin J.
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