Lattice QCD determination of patterns of excited baryon states
Creators
- 1. Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
- 2. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
- 3. Yale University, New Haven, Connecticut 06520 (United States)
- 4. Department of Physics, University of the Pacific, 3601 Pacific Avenue Stockton, California 95211 (United States)
- 5. RIKEN BNL Research Center Building 510A, Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
- 6. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
- 7. Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
- 8. University of Maryland, College Park, Maryland 20742 (United States)
Description
Energies for excited isospin I=(1/2) and I=(3/2) states that include the nucleon and Δ families of baryons are computed using quenched, anisotropic lattices. Baryon interpolating field operators that are used include nonlocal operators that provide G2 irreducible representations of the octahedral group. The decomposition of spin (5/2) or higher spin states is realized for the first time in a lattice QCD calculation. We observe patterns of degenerate energies in the irreducible representations of the octahedral group that correspond to the subduction of the continuum spin (5/2) or higher. The overall pattern of low-lying excited states corresponds well to the pattern of physical states subduced to the irreducible representations of the octahedral group
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.76.074504;
- arXiv
- arXiv:0709.0008v3;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 76
- Journal Issue
- 7
- Journal Page Range
- p. 074504-074504.14
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39052573
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ANISOTROPY; DELTA BARYONS; EXCITED STATES; FIELD OPERATORS; IRREDUCIBLE REPRESENTATIONS; ISOSPIN; LATTICE FIELD THEORY; NUCLEONS; QUANTUM CHROMODYNAMICS; SPIN
- Descriptors DEC
- ANGULAR MOMENTUM; BARYONS; CONSTRUCTIVE FIELD THEORY; ELEMENTARY PARTICLES; ENERGY LEVELS; FERMIONS; FIELD THEORIES; HADRONS; MATHEMATICAL OPERATORS; N*BARYONS; PARTICLE PROPERTIES; QUANTUM FIELD THEORY; QUANTUM OPERATORS
Optional Information
- Notes
- (c) 2007 The American Physical Society