2008/03/31 by Takayasu Sekihara, T. Sekihara, Tetsuo Hyodo +3 · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1016/j.physletb.2008.09.023
published as Phys.Lett.B669:133-138,2008 · 7 pages, 4 figures, use elsart3p.cls
openalex publication_date 2008/09/20 · arxiv created 2008/10/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
The electromagnetic mean squared radii, 〈r2〉E and 〈r2〉M, of Λ(1405) are calculated in the chiral unitary model. We describe the excited baryons as dynamically generated resonances in the octet meson and octet baryon scattering. We evaluate values of 〈r2〉E and 〈r2〉M for the Λ(1405) on the resonance pole and obtain their complex values. We also consider Λ(1405) obtained by neglecting decay channels. For the latter case, we obtain negative and larger absolute electric mean squared radius than that of typical ground state baryons. This implies that Λ(1405) has structure that K− is widely spread around p.