This talk provides an overview of recent results for two- and three-nucleon systems obtained within the framework of the covariant spectator theory (CST). The main features of two recently published models for the neutron–proton interaction, that fit the 2007 world data base containing several thousands of neutron-proton scattering data below 350 MeV with χ 2/N data ≈ 1, are presented. These one-boson-exchange models, called WJC-1 and WJC-2, have a considerably smaller number of adjustable parameters than are present in realistic nonrelativistic potentials. When applied to the three-nucleon bound state, the correct binding energy is obtained without additional three-body forces. First calculations of the electromagnetic form factors of helium-3 and the triton in complete impulse approximation also give very reasonable results. One can conclude that the CST yields a very efficient description of few-nucleon systems, in which the relativistic formulation of the dynamics is an essential element.
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机译:本演讲概述了在协变旁观者理论(CST)框架内获得的两个和三个核子系统的最新结果。最近发布的两个中子-质子相互作用模型的主要特征,符合2007年世界数据库,其中包含数千个低于350 MeV的中子-质子散射数据以及χ 2 sup> / N 数据 sub>≈1。与实际的非相对论电势相比,这些称为WJC-1和WJC-2的单玻色子交换模型的可调整参数数量要少得多。当应用于三核子结合态时,无需额外的三体力即可获得正确的结合能。完全脉冲近似中氦3和the核的电磁形状因子的首次计算也得出了非常合理的结果。可以得出结论,CST对少数核子系统产生了非常有效的描述,其中相对论性的动力学表述是必不可少的。
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