Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/131706
Title: | Meson-baryon scattering lengths from mixed-action lattice QCD |
Author: | Torok, Aaron Beane, Silas R. Detmold, William Luu, Thomas C. Orginos, Kostas Parreño García, Assumpta Savage, Martin J. Walker-Loud, André NPLQCD Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 26-Apr-2010 |
Publisher: | American Physical Society |
Abstract: | 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.81.074506 |
It is part of: | Physical Review D, 2010, vol. 81, num. 7, p. 074506 |
URI: | http://hdl.handle.net/2445/131706 |
Related resource: | https://doi.org/10.1103/PhysRevD.81.074506 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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