Origin of Dynamically Generated Baryon Rsonances

摘要：

We study the origin of baryon resonances which are dynamically generated in the chiral unitary approach.We propose a natural renormalization scheme for the dynamical generation of resonances using the low energy chiral interaction and a general feature of the scattering theory.A deviation of a phenomenological scattering amplitude from the natural one is interpreted by an effective pole term interaction of genuine nature which can not be described by the meson-baryon dynamics,reminiscent of the CDD pole.Applying the present method to physical meson-baryon scatterings,we find that the ∧(1405) resonance is dominated by a meson-baryon component forming a (K)N-π∑ molecular-like structure,while the N(1535) resonance requires some pole contribution.

关键词： baryon resonances dynamical generation chiral unitary approach

作者: T.Hyodo D.Jido A.Hosaka

作者单位: Physik-Department,Technische Universit(a)t München,D-85747 Garching,Germany;Yukawa Institute for The Yukawa Institute for Theoretical Physics,Kyoto University,Kyoto 606-8502,Japan Research Center for Nuclear Physics (RCNP),Ibaraki,Osaka 567-0047,Japan

会议类型: 国际会议

会议名称: 3rd China-Japan-Korea Hadron and Nuclear Physics 2008 Symposium(第三届中日韩强子物理与核物理研讨会)

会议地点: 兰州

会议语种:英文

页码: 1-6

在线出版日期: 2008-06-23（万方平台首次上网日期，不代表论文的发表时间）