A pentaquark model for Lambda(1405)
arXiv:hep-ph/0611051 · doi:10.1016/j.nuclphysa.2007.03.172
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