The K+K+ Scattering Length from Lattice QCD

Details The K+K+ Scattering Length from Lattice QCD The K+K+ Scattering Length from Lattice QCD

2007-09-07

arxiv.org/abs/0709.1169v1

Phys.Rev.D77:094507,2008

Physics

High Energy Physics

High Energy Physics - Lattice

17 pages, 12 figures. NPLQCD collaboration

Scientific paper

10.1103/PhysRevD.77.094507

The K+K+ scattering length is calculated in fully-dynamical lattice QCD with domain-wall valence quarks on the MILC asqtad-improved gauge configurations with rooted staggered sea quarks. Three-flavor mixed-action chiral perturbation theory at next-to-leading order, which includes the leading effects of the finite lattice spacing, is used to extrapolate the results of the lattice calculation to the physical value of m_{K+}/f_{K+}. We find m_{K+} a_{K+K+} = -0.352 +- 0.016, where the statistical and systematic errors have been combined in quadrature.

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