Published August 1, 2006
| Version v1
Journal article
Decoupling spurious baryon states in the 1/Nc expansion of QCD
- 1. Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85287-1504 (United States)
- 2. Department of Physics, University of Maryland, College Park, Maryland 20742-4111 (United States)
Description
We identify spurious states in meson-baryon scattering, those that appear in QCD for Nc>3 but decouple for Nc=3. The key observation is that the relevant flavor SU(3) Clebsch-Gordan coefficients contain factors of 1-3/Nc. We show that this method works even if SU(3) is badly broken. We also observe that resonant scattering poles lying outside naive quark-model multiplets are not necessarily large Nc artifacts, and can survive via configuration mixing at Nc=3
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.74.036001;
- arXiv
- arXiv:hep-ph/0604175v2;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 74
- Journal Issue
- 3
- Journal Page Range
- p. 036001-036001.6
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38038737
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BARYONS; CLEBSCH-GORDAN COEFFICIENTS; CONFIGURATION MIXING; DECOUPLING; FLAVOR MODEL; MESON-BARYON INTERACTIONS; MULTIPLETS; QUANTUM CHROMODYNAMICS; RESONANCE SCATTERING; SU-3 GROUPS
- Descriptors DEC
- COMPOSITE MODELS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; HADRONS; INELASTIC SCATTERING; INTERACTIONS; LIE GROUPS; MATHEMATICAL MODELS; PARTICLE INTERACTIONS; PARTICLE MODELS; QUANTUM FIELD THEORY; QUARK MODEL; SCATTERING; SU GROUPS; SYMMETRY GROUPS
Optional Information
- Notes
- (c) 2006 The American Physical Society