Strange dibaryon resonance in the KNN-{pi}YN system

Journal Article · Sat Sep 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.035203· OSTI ID:21064373

Ikeda, Y; Sato, T ^[1]

---

1. Department of Physics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan)

Three-body resonances in the KNN system have been studied within a framework of the KNN-{pi}YN coupled-channel Faddeev equation. By solving the three-body equation, the energy dependence of the resonant KN amplitude is fully taken into account. The S-matrix pole has been investigated from the eigenvalue of the kernel with the analytic continuation of the scattering amplitude on the unphysical Riemann sheet. The KN interaction is constructed from the leading order term of the chiral Lagrangian using relativistic kinematics. The {lambda}(1405) resonance is dynamically generated in this model, where the KN interaction parameters are fitted to the data of scattering length. As a result we find a three-body resonance of the strange dibaryon system with binding energy B{approx}79 MeV and width {gamma}{approx}74 MeV. The energy of the three-body resonance is found to be sensitive to the model of the I=0 KN interaction.

• OSTI ID: 21064373
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BINDING ENERGY
CHIRALITY
COUPLED CHANNEL THEORY
DIBARYONS
EIGENVALUES
ENERGY DEPENDENCE
FADDEEV EQUATIONS
KAON-NUCLEON INTERACTIONS
KERNELS
LAGRANGIAN FUNCTION
LAMBDA-1405 BARYONS
MEV RANGE
PARTICLE WIDTHS
RELATIVISTIC RANGE
RESONANCE PARTICLES
RIEMANN SHEET
S MATRIX
SCATTERING AMPLITUDES
SCATTERING LENGTHS
THREE-BODY PROBLEM