2026-04-13T01:30:57Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1317062025-12-05T16:42:00Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917
RECERCAT
author
Torok, Aaron
author
Beane, Silas R.
author
Detmold, William
author
Luu, Thomas C.
author
Orginos, Kostas
author
Parreño García, Assumpta
author
Savage, Martin J.
author
Walker-Loud, André
author
NPLQCD Collaboration
2019-04-08T08:25:56Z2019-04-08T08:25:56Z2010-04-262019-04-08T08:25:57Z
The π + Σ + , π + Ξ 0 , K + p , K + n , and ¯¯¯¯ K 0 Ξ 0 scattering lengths are calculated in mixed-action Lattice QCD with domain-wall valence quarks on the asqtad-improved coarse MILC configurations at four light-quark masses, and at two light-quark masses on the fine MILC configurations. Heavy-baryon chiral perturbation theory with two and three flavors of light quarks is used to perform the chiral extrapolations. To the order we work in the three-flavor chiral expansion, the kaon-baryon processes that we investigate show no signs of convergence. Using the two-flavor chiral expansion for extrapolation, the pion-hyperon scattering lengths are found to be a π + Σ + = − 0.197 ± 0.017 fm , and a π + Ξ 0 = − 0.098 ± 0.017 fm , where the comprehensive error includes statistical and systematic uncertainties.
(c) American Physical Society, 2010 info:eu-repo/semantics/openAccess
Física de partícules
Experiments
Particle physics
Experiments
Meson-baryon scattering lengths from mixed-action lattice QCD
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion