{lambda}(1405) and {lambda}(1405) in J/{psi} four-body decays

Journal Article · Wed Dec 01 04:00:00 EST 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.065202· OSTI ID:20695840

Chiangbing, Li; Oset, E ^[1]

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1. Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Apdo. Correos 22085, 46071 Valencia (Spain)

We study the structure of the baryon resonances {lambda}(1405) and {lambda}(1405) in J/{psi} four-body decays J/{psi}{yields}{sigma}{sigma}{pi}{pi} in the framework of a coupled channel chiral unitary approach. With still sufficient freedom for model parameters, the {lambda}(1405) and {lambda}(1405) resonances are generated by simultaneously taking the meson baryon and meson antibaryon final state interactions into account. The {pi}{sigma} ({pi}{sigma}) invariant mass distributions peak around 1410 MeV, which favors the assertion that the {lambda}(1405) [{lambda}(1405)] is a superposition of the two {lambda}(1405) [{lambda}(1405)] states which dominantly couple to KN (KN) and {pi}{sigma} ({pi}{sigma}), respectively. We also calculate the amplitude for isospin I=1 which gives hints of a possible I=1 baryon resonance in the energy region of the {lambda}(1405), which up to now has not been observed.

• OSTI ID: 20695840
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 70; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANTIBARYONS
CHIRAL SYMMETRY
CHIRALITY
COUPLED CHANNEL THEORY
FINAL-STATE INTERACTIONS
FOUR-BODY PROBLEM
HADRONIC PARTICLE DECAY
ISOSPIN
J PSI-3097 MESONS
LAGRANGIAN FIELD THEORY
LAMBDA-1405 BARYONS
MASS DISTRIBUTION
PARTICLE PRODUCTION
PERTURBATION THEORY
PIONS
RESONANCE PARTICLES
SIGMA BARYONS
UNITARY SYMMETRY