有效场论
Effective field theories
摘要：
低能有效场论教学导论。在其中一些中，重粒子被“积分出去”（一个典型的例子--海森堡-欧拉EFT）;在一些重粒子中，它们仍然存在，但它们的一些自由度被“积分出去”（布洛赫-诺德西克EFT）。从技术上讲，这些讲座的很大一部分是在量子电动力学的框架内。QCD的例子，即重口味和HQET的去耦，只简要讨论。然而，QCD的有效场论与QED的情况非常相似，只是有一些小的技术复杂性：更多的图表，颜色因子等。区域方法提供了一个替代的观点在低能有效理论，它也简要介绍。
英文摘要：
A pedagogical introduction to low-energy effective field theories. In some of them, heavy particles are "integrated out" (a typical example - the Heisenberg-Euler EFT); in some heavy particles remain but some of their degrees of freedom are "integrated out" (Bloch-Nordsieck EFT). A large part of these lectures is, technically, in the framework of QED. QCD examples, namely, decoupling of heavy flavors and HQET, are discussed only briefly. However, effective field theories of QCD are very similar to the QED case, there are just some small technical complications: more diagrams, color factors, etc. The method of regions provides an alternative view at low-energy effective theories; it is also briefly introduced.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
