The 27-plet baryons with spin 3/2 under SU(3) symmetry
نویسنده
چکیده
We investigate the spin 3/2 baryons in the 27-plet based on flavor SU(3) symmetry. For J = 3/2, we find all the candidates for non-exotic members. For J = 3/2−, we predict a new non-exotic member Λ(1780). Fitting the mass spectrum and calculating the widths of the members show an approximate symmetry of the 27-plet of SU(3). We find that the exotic members have relatively large widths and the Ξ(1950) has spin and parity J = 3/2−. The possibility of assigning the non-exotic candidates to an octet is also analyzed. PACS. 11.30.Hv Flavor symmetry – 12.39.Mk Glueball and nonstandard multiquark/gluon states – 13.30.Eg Hadron decay
منابع مشابه
Pentaquark baryons in SU(3) quark model
We study the SU(3) group structure of pentaquark baryons which are made of four quarks and one antiquark. The pentaquark baryons form 1, 8, 10, 10, 27, and 35 multiplets in SU(3) quark model. First, the flavor wave functions of all the pentaquark baryons are constructed in SU(3) quark model and then the flavor SU(3) symmetry relations for the interactions of the pentaquarks with three-quark bar...
متن کاملThe 35-plet Baryons from Chiral Soliton Models
We investigate the 35-plet baryons from the chiral soliton models. We find that the coupling constant for the decay of 35-plet baryons with spin 3/2 to the decuplet baryons is surprisingly small, but that for the decay to 27-plet baryons with spin 3/2 is larger. We give all the masses and widths of 35-plet baryons with spin 5/2 and suggest candidates for all nonexotic members from the available...
متن کاملMasses of the 70(-) baryons in large N(c) QCD.
The masses of the negative parity 70-plet baryons are analyzed in large N(c) QCD to order 1/N(c) and to first order in SU(3) symmetry breaking. The existing experimental data are well reproduced and 20 new observables are predicted. The leading order SU(6) spin-flavor symmetry breaking is small and, as it occurs in the quark model, the subleading in 1/N(c) hyperfine interaction is the dominant ...
متن کاملOrbitally Excited Baryon Spectroscopy in the 1/nc Expansion
The discussion of the 70-plet of negative parity baryons illustrates the large Nc QCD approach to orbitally excited baryons. In the case of the ` = 1 baryons the existing data allows to make numerous predictions to first order in the SU(3) symmetry breaking. New relations between splittings are found that follow from the spin-flavor symmetry breaking. The Λ(1405) is well described as a three-qu...
متن کاملNaturalness of the Coleman-Glashow Mass Relation in the 1/Nc Expansion: an Update
A new measurement of the Ξ mass verifies the accuracy of the ColemanGlashow relation at the level predicted by the 1/Nc expansion. Values for other baryon isospin mass splittings are updated, and continue to agree with the 1/Nc hierarchy. 11.15.Pg, 14.20.-c,13.40.Dk Typeset using REVTEX [email protected] [email protected] The recent measurement of the Ξ mass 1314.82± 0.06± 0.2 MeV by the NA48 coll...
متن کامل