Lattice QCD determination of patterns of excited baryon states
- Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
- Yale University, New Haven, Connecticut 06520 (United States)
- Department of Physics, University of the Pacific, 3601 Pacific Avenue Stockton, California 95211 (United States)
- RIKEN BNL Research Center Building 510A, Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
- Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
- University of Maryland, College Park, Maryland 20742 (United States)
Energies for excited isospin I=(1/2) and I=(3/2) states that include the nucleon and {delta} families of baryons are computed using quenched, anisotropic lattices. Baryon interpolating field operators that are used include nonlocal operators that provide G{sub 2} 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.
- OSTI ID:
- 21032366
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 76, Issue 7; Other Information: DOI: 10.1103/PhysRevD.76.074504; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Lattice QCD determination of states with spin 5/2 or higher in the spectrum of nucleons
Light baryon spectrum using improved interpolating operators