Electromagnetic mass differences of the octet and decuplet baryons

Journal Article · Sun Mar 01 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.1686· OSTI ID:7277553

Morpurgo, G ^[1]

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1. Istituto di Fisica dell'Universita and Istituto Nazionale di Fisica Nucleare, Genova (Italy)

The general parametrization method (Phys. Rev. D 40, 2997 (1989)), an exact consequence of any QCD-like relativistic field theory, is used to parametrize the electromagnetic mass differences of the baryons. First we show that the Coleman-Glashow relationship, derived neglecting flavor breaking, continues to hold if all flavor-breaking terms are kept, except the three-quark ones; this may explain why the formula agrees so well with the data. In addition, neglecting only three-quark terms, we reproduce some equalities between electromagnetic mass differences of {bold 8} and 1{bold 0} baryons derived a long time ago (A. Gal and F. Scheck, Nucl. Phys. B2, 110 (1967)) by the nonrelativistic quark model (NRQM). Also these equalities, now testable due to the improved knowledge of decuplet masses, are well satisfied; they now appear as a general consequence of a relativistic QCD-like field theory, not just of the NRQM.

• OSTI ID: 7277553
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 45:5; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
MASS DIFFERENCE
EIGENSTATES
ELECTROMAGNETIC INTERACTIONS
FLAVOR MODEL
QUANTUM CHROMODYNAMICS
QUANTUM NUMBERS
QUARK MODEL
RELATIVITY THEORY
SYMMETRY BREAKING
WAVE FUNCTIONS
BASIC INTERACTIONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FUNCTIONS
GENERAL RELATIVITY THEORY
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
QUANTUM FIELD THEORY
662390* - Electromagnetic Processes & Properties- (1992-)
662230 - Quantum Chromodynamics- (1992-)
662410 - Properties of Baryons & Baryon Resonances- (1992-)