Baryonic Resonances from the Interactions of the Baryon Decuplet and Meson Octet

Journal Article · Sat Feb 11 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2176487· OSTI ID:20798073

Oset, E; Sarkar, S; Vacas, M J. Vicente ^[1]

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1. Departamento de Fisica Teorica, Institutos de Investigacion de Paterna -- Universidad de Valencia-CSIC, Apdo. correos 22085, 46071, Valencia (Spain)

We study S-wave interactions of the baryon decuplet with the octet of pseudoscalar mesons using the lowest order chiral Lagrangian. We find two bound states in the SU(3) limit corresponding to the octet and decuplet representations. These are found to split into eight different trajectories in the complex plane when the SU(3) symmetry is broken gradually. Finally, we are able to provide a reasonable description for a good number of 4-star (3/2){sup -} resonances listed by the Particle Data Group. In particular, the {xi}(1820), the {lambda}(1520) and the {sigma}(1670) states are well reproduced. We predict a few other resonances and also evaluate the couplings of the observed resonances to the various channels from the residues at the poles of the scattering matrix from where partial decay widths into different channels can be evaluated.

• OSTI ID: 20798073
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 814; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOUND STATE
CHIRAL SYMMETRY
CHIRALITY
LAGRANGIAN FUNCTION
LAMBDA-1520 BARYONS
MESON OCTETS
MESON-BARYON INTERACTIONS
PARTICLE DECAY
PARTICLE WIDTHS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
S WAVES
SCATTERING
SIGMA-1670 BARYONS
SU-3 GROUPS
XI-1820 BARYONS