New mass formula for octet and decuplet baryons

Journal Article · Mon Jan 13 00:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.139· OSTI ID:5107005

Morpurgo, G ^[1]

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

The general parametrization method (Phys. Rev. D 40, 2997 (1989)) (an exact consequence of a QCD-like relativistic field theory) is used to parametrize the masses of {bold 8} and 1{bold 0} baryons to second order in flavor breaking. Because at first order in flavor breaking, three-quark contributions to octet masses are very small, we neglect such contributions at second order and derive a corrected'' Gell-Mann--Okubo formula; when written in a way free from electromagnetic corrections, it is 1/2({ital n}+{Xi}{sup 0})+{ital T}=1/4(3{Lambda}+{Sigma}{sup +}) with {ital T}={Xi}{sup *{minus}}{minus}1/2({Omega}+{Sigma}{sup *{minus}}) and {cflx {Sigma}} {sup +}=2{Sigma}{sup +}{minus}{Sigma}{sup 0}+2({ital n}{minus}{ital p}). The two sides of the formula are respectively 1132.4{plus minus}0.8 and 1133.9{plus minus}0.1 MeV.

• OSTI ID: 5107005
• Journal Information: Physical Review Letters; (United States), Vol. 68:2; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON DECUPLETS
MASS FORMULAE
BARYON OCTETS
FLAVOR MODEL
PARAMETRIC ANALYSIS
COMPOSITE MODELS
MATHEMATICAL MODELS
MULTIPLETS
PARTICLE MODELS
PARTICLE MULTIPLETS
QUARK MODEL
662410* - Properties of Baryons & Baryon Resonances- (1992-)