Parity of antidecuplet baryons reexamined from chiral soliton models
- Department of Physics, Peking University, Beijing 100871 (China)
- CCAST (World Laboratory), P.O. Box 8730, Beijing 100080 (China)
We recalculate masses and widths of antidecuplet baryons in the case of positive parity from chiral soliton models, provided that the member {xi}{sub 3/2} of the antidecuplet has a mass 1.86 GeV, as reported recently. Calculations show that there are no convincing candidates for the nonexotic members of the antidecuplet available in the baryon listings. Up to the leading order of m{sub s} and 1/N{sub c}, the width formula for the decay of the antidecuplet baryons to the octet depends only on SU(3) symmetry model independently, except the coupling constant. Similarly, we give a width formula for the decay of negative parity baryons belonging to certain SU(3) baryon multiplets by pure symmetry consideration. By this formula, we find that if we have an antidecuplet with negative parity and that the masses are the same as those given by chiral soltion models, the identification of N(1650) as N{sub 10-bar} are inconsistent with experiments for N(1650){yields}N{pi} while the widths agree with other two decay channels involving strangeness. And {sigma}(1750) seems to be a reasonable candidate for {sigma}{sub 10-bar}.
- OSTI ID:
- 20705675
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 9; Other Information: DOI: 10.1103/PhysRevD.70.097503; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mixing and decays of the antidecuplet in context of approximate SU(3) symmetry
Broken SU(3) antidecuplet for {Theta}{sup +} and {Xi}{sub 3/2}
Related Subjects
CHIRAL SYMMETRY
CHIRALITY
COUPLING CONSTANTS
GEV RANGE
HADRONIC PARTICLE DECAY
MASS FORMULAE
N-1650 BARYONS
NONLINEAR PROBLEMS
PARITY
PARTICLE MULTIPLETS
PARTICLE PRODUCTION
QUANTUM FIELD THEORY
REST MASS
SIGMA-1750 BARYONS
SOLITONS
STRANGENESS
SU-3 GROUPS
XI BARYONS