标题： 重子作为有效手征场理论中的孤立子 显示英文标题

标题： Baryons as Solitons in Effective Chiral Field Theories

摘要： 本讲座涵盖了关于将重子描述为有效手征介子理论中的拓扑孤立子的一些最新进展。 在第一部分中讨论了对经典树近似的单环修正。 这涉及低能耦合常数的重整化以及$1/N_c$展开中有限的下一阶项的计算。 给出了各种核子可观测量的最新结果。 在第二部分中，在包含矢量介子的手征孤立子模型中，考虑相对论修正，计算了电磁核子形式因子（FFs）。 磁 FF$G_M^p$与新 SLAC 数据在类空$Q^2$上至 30(GeV/c)$^2$的范围内吻合良好，如果强制超收敛的话。 电 FF$G_E^p$在几个 (GeV/c)$^2$区域内由一个零点主导。 第三部分描述了如何从手征孤立子模型中提取强$\pi NN$形式因子，同时注意由于孤立子存在而产生的局部度规。 当在单玻色子交换模型中用于核子-核子（NN）相互作用时，氘核的性质和NN散射的相位参数也能被再现，如同传统的NN模型中在$\pi NN$顶点应用硬单极形式因子一样。 显示英文摘要

摘要： This lecture comprises some recent developments concerning the description of baryons as topological solitons in effective chiral meson theories. In the first part one-loop corrections to the classical tree approximation are discussed. This involves renormalization of low-energy coupling constants and evaluation of the finite next-to-leading-order terms in the $1/N_c$ expansion. Recent results for various nucleon observables are presented. In the second part electromagnetic nucleon form factors (FFs) with relativistic corrections are evaluated in a chiral soliton model including vector mesons. The magnetic FF $G_M^p$ is shown to agree well with new SLAC data for spacelike $Q^2$ up to 30(GeV/c)$^2$ if superconvergence is enforced. The electric FF $G_E^p$ is dominated by a zero in the few (GeV/c)$^2$ region. The third part describes how to extract the strong $\pi NN$ form factor from chiral soliton models, taking due care of the local metric created by the presence of the soliton. When used in a one-boson-exchange model for the nucleon-nucleon (NN) interaction, deuteron properties and phase parameters of NN scattering are reproduced as well as in conventional NN models that apply a hard monopole form factor at the $\pi NN$ vertex.