论文标题
Pion-Nucleon Sigma术语的简短历史
Brief history of the pion-nucleon sigma term
论文作者
论文摘要
Pion-Nucleon Sigma项是粒子和核物理许多重要方面涉及的数量。在这篇综述中，我显示了它的起源以及它如何与重要问题相连，作为普通物质质量的起源，暗物质检测和核合成的研究。我提到了用于获得Sigma术语的最常见方法，并评论提取的值。如图所示，Sigma术语的公认值一直从相对较低（$ \ sim 40 $ MEV）转移到较大的（$ \ sim 60 $ MEV），直到今天，此争议仍然存在。
The pion-nucleon sigma term is a quantity involved in many important aspects of particle and nuclear physics. In this review I show its origin and how it is connected to important questions as the origin of mass of the ordinary matter, studies of dark matter detection and nucleosynthesis. I mention the most common methods used to obtain the sigma term, and comment on the extracted values. As it is shown, the accepted value of the sigma term has been moving from relatively low ($\sim 40$ MeV) to larger ones ($\sim 60$ MeV) until today, where this controversy still persist.
