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K+K+ scattering length from lattice QCD Beane, Silas R. Luu, Thomas C. Orginos, Kostas Parreño García, Assumpta Savage, Martin J. Torok, Aaron Walker-Loud, André NPLQCD Collaboration Física de partícules Hadrons Neutrons Particle physics Hadrons Neutrons 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. 2019-04-05T14:11:45Z 2019-04-05T14:11:45Z 2008-05-21 2019-04-05T14:11:45Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.77.094507 Physical Review D, 2008, vol. 77, num. 9, p. 094507 https://doi.org/10.1103/PhysRevD.77.094507 (c) American Physical Society, 2008 info:eu-repo/semantics/openAccess American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)