Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum

Fernando, I. P.; Goity, J. L.

doi:10.1103/PhysRevD.91.036005

Title: Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum

Journal Article · Sun Feb 01 00:00:00 EST 2015 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.91.036005· OSTI ID:1170409

Fernando, I. P. ^[1]; Goity, J. L. ^[1]

Hampton Univ. Hampton, VA (United States) Dept. of Physics; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

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^P=0⁺] ground state and excited baryons, and the [56,2⁺] and [70}},1^-] excited states are analyzed. The analyses are carried out to order O(1/N_c) 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.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-06OR23177; PHY-0855789; PHY-1307413

OSTI ID:: 1170409

Alternate ID(s):: OSTI ID: 1180854

Report Number(s):: JLAB-THY-14-1961; DOE/OR/23177-3188; PRVDAQ; ArticleNumber: 036005

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 91, Issue 3; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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