A pentaquark model for Lambda(1405)

Abstract

We study a pentaquark model of the negative parity hyperon Lambda(1405). We choose a specific quark configuration for trial, and use the perturbative chiral quark model extended to four quarks and one anti-quark system. We calculate a sigma-term and a scalar form factor of the hyperon and demonstrate their usefulness to study the nature of the hyperon.

4 pages, 2 figures, espcrc1, Proceedings of the 18th International IUPAP Conference on Few-Body Problems in Physics, FB18, held in Santos, Brazil, on August 21-16, 2006

References in corpus (6)

• Non perturbative chiral approach to s-wave \bar{K}N interactions
• Sigma-term physics in the perturbative chiral quark model
• Magnetic moments of the Lambda(1405) and Lambda(1670) resonances
• Negative-parity baryon spectra in quenched anisotropic lattice QCD
• Updated analysis of meson-nucleon sigma terms in the perturbative chiral quark model
• Lambda(1405) in the Bound State Soliton Model

Cited by in corpus (5)

• Lineshape of the Lambda(1405) Hyperon Measured Through its Sigma0 pion0 Decay
• Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_γ= 1.5-2.4 GeV
• The pole structure of the Lambda(1405) in a recent QCD simulation
• Separable potential model for $K^{-}N$ interactions at low energies
• Associated strangeness production in the pp to pK^+K^-p and pp to pK^+ pi^0 Sigma^0 reactions