Meson-baryon scattering lengths from mixed-action lattice QCD
Creators
- 1. Department of Physics, University of New Hampshire, Durham, New Hampshire 03824-3568 (United States)
- 2. Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States)
- 3. Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795 (United States)
- 4. N Division, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
- 5. Departament d'Estructura i Constituents de la Materia and Institut de Ciencies del Cosmos, Universitat de Barcelona, E-08028 Barcelona (Spain)
- 6. Department of Physics, University of Washington, Seattle, Washington 98195-1560 (United States)
Description
The π+Σ+, π+Ξ0, K+p, K+n, and K0Ξ0 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 aπ+Σ+=-0.197±0.017 fm, and aπ+Ξ0=-0.098±0.017 fm, where the comprehensive error includes statistical and systematic uncertainties.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.81.074506;
- arXiv
- arXiv:0907.1913v1;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 81
- Journal Issue
- 7
- Journal Page Range
- p. 074506-074506.18
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 42002663
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- CHIRALITY; COMPUTERIZED SIMULATION; CONVERGENCE; D QUARKS; FLAVOR MODEL; KAONS NEUTRAL; KAONS PLUS; LATTICE FIELD THEORY; MASS; MESON-BARYON INTERACTIONS; NEUTRONS; PERTURBATION THEORY; PIONS PLUS; PROTONS; QUANTUM CHROMODYNAMICS; SCATTERING LENGTHS; SIGMA PLUS PARTICLES; U QUARKS; XI NEUTRAL PARTICLES
- Descriptors DEC
- BARYONS; BOSONS; COMPOSITE MODELS; CONSTRUCTIVE FIELD THEORY; DIMENSIONS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; HADRONS; HYPERONS; INTERACTIONS; KAONS; LENGTH; MATHEMATICAL MODELS; MESONS; NUCLEONS; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; QUARK MODEL; QUARKS; SIGMA BARYONS; SIGMA PARTICLES; SIMULATION; STRANGE MESONS; STRANGE PARTICLES; XI BARYONS; XI PARTICLES
Optional Information
- Notes
- (c) 2010 The American Physical Society
- Collaborations
- NPLQCD Collaboration