K(+)K(+) scattering length from lattice QCD
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.
Physical Review D
AMERICAN PHYSICAL SOCIETY
Digital Object Identifier (DOI)
Beane, Silas R.; Luu, Thomas C.; Originos, Kostas; Parreno, Assumpta; Savage, Martin J.; Torok, Aaron; and Walker-Loud, Andre, "K(+)K(+) scattering length from lattice QCD" (2008). Physical Review D. 123.
© 2008 The American Physical Society