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arXiv 0807.20912008-07-14nucl-th

Electromagnetic Mean Squared Radii of Lambda(1405) in Meson-baryon Dynamics with Chiral Symmetry

Takayasu Sekihara, Tetsuo Hyodo, Daisuke Jido

备注：: 4 pages, 2 figures, use ptptex.cls. Talk given at YITP International Symposium: Fundamental Problems in Hot and/or Dense QCD, Kyoto, Japan, 3-6 Mar 2008
发表信息：: Prog.Theor.Phys.Suppl.174:266-269,2008
DOI：: 10.1143/PTPS.174.266

英文摘要：

Electromagnetic mean squared radii of Lambda(1405) are evaluated in chiral unitary approach. In this approach we regard Lambda(1405) as dynamically generated resonances in the octet meson and octet baryon scattering, and also as KbarN bound state. Especially for the Lambda(1405) as KbarN bound state we obtain negative electric mean squared radius. With the small binding energy of Lambda(1405) in the chiral unitary approach, our results imply that Lambda(1405) has structure that K^- is widely spread around p.

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