Masses of [70,l{sup +}] baryons in the 1/N{sub c} expansion

Journal Article · Tue Aug 01 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.034014· OSTI ID:20869246

Matagne, N; Stancu, Fl ^[1]

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1. University of Liege, Institute of Physics B5, Sart Tilman, B-4000 Liege 1 (Belgium)

The masses of positive parity [70,0{sup +}] and [70,2{sup +}] nonstrange and strange baryons are calculated in the 1/N{sub c} expansion. The approach is based on the separation of a system of N{sub c} quarks into an excited core and an excited quark. The previous work for two flavor baryons is now extended to include strange baryons, to first order in SU(3)-flavor breaking. We show that the extension to N{sub f}=3 maintains the regularities previously observed in the behavior of the linear term in N{sub c}, of the spin-spin and of the spin-orbit terms. In particular the contribution of the spin-dependent terms decrease with the excitation energy, the dominant term remaining the spin-spin term.

• OSTI ID: 20869246
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 3; Other Information: DOI: 10.1103/PhysRevD.74.034014; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
EXCITATION
FLAVOR MODEL
HYPERONS
L-S COUPLING
PARITY
QUARKS
REST MASS
SPIN