Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Nuclear Physics, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 036,005 : digital, PDF file
- Additional Creators:
- Thomas Jefferson National Accelerator Facility (U.S.)
United States. Department of Energy. Office of Nuclear Physics
United States. Department of Energy. Office of Scientific and Technical Information
- The excited baryon masses are analyzed in the framework of the 1/Nc expansion using the available physical masses and also the masses obtained in lattice QCD for different quark masses. The baryon states are organized into irreducible representations of SU(6) x O(3), where the [56,l<sup>P</sup>=0⁺] ground state and excited baryons, and the [56,2<sup>+</sup>] and [70}},1<sup>-</sup>] excited states are analyzed. The analyses are carried out to order O(1/N<sub>c</sub>) and first order in the quark masses. The issue of state identifications is discussed. Numerous parameter independent mass relations result at those orders, among them the well known Gell-Mann-Okubo and Equal Spacing relations, as well as additional relations involving baryons with different spins. It is observed that such relations are satisfied at the expected level of precision. The main conclusion of the analysis is that qualitatively the dominant physical effects are similar for the physical and the lattice QCD baryons.
- Published through SciTech Connect.
Physical Review. D, Particles, Fields, Gravitation and Cosmology 91 3 ISSN 1550-7998; PRVDAQ AM
Fernando, I. P.; Goity, J. L.
- Funding Information:
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