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

Abstract

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.

Authors:

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)

Publication Date:: Sun Feb 01 00:00:00 EST 2015

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

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

OSTI Identifier:: 1170409

Alternate Identifier(s):: OSTI ID: 1180854

Report Number(s):: JLAB-THY-14-1961; DOE/OR/23177-3188
Journal ID: ISSN 1550-7998; PRVDAQ; ArticleNumber: 036005

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

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 91; Journal Issue: 3; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; BARYONS; LATTICE QCD; LARGE N

Citation Formats


                    Fernando, I. P., and Goity, J. L. Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevD.91.036005.

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                    Fernando, I. P., & Goity, J. L. Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum.  United States.  https://doi.org/10.1103/PhysRevD.91.036005

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                    Fernando, I. P., and Goity, J. L. Sun .  
"Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum".  United States.  https://doi.org/10.1103/PhysRevD.91.036005.  https://www.osti.gov/servlets/purl/1170409.

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@article{osti_1170409,

  title        = {Baryon spin-flavor structure from an analysis of lattice QCD results of the baryon spectrum},

  author       = {Fernando, I. P. and Goity, J. L.},

  abstractNote = {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,lP=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/Nc) 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.},

  doi          = {10.1103/PhysRevD.91.036005},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 3,

  volume       = 91,

  place        = {United States},

  year         = {Sun Feb 01 00:00:00 EST 2015},

  month        = {Sun Feb 01 00:00:00 EST 2015}

}

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

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