论文标题
有效的现场理论
Effective field theories
论文作者
论文摘要
低能量有效野外理论的教学介绍。在其中一些中，沉重的颗粒被“整合”（一个典型的例子-Heisenberg -euler eft）；在某些沉重的颗粒中，仍然存在一些自由度“整合”（Bloch-nordsieck eft）。从技术上讲，这些讲座的很大一部分是在QED的框架中。 QCD示例，即，仅简短讨论重量味道和HQET的脱钩。但是，QCD的有效现场理论与QED案例非常相似，只有一些小的技术并发症：更多的图表，色素因素等。区域方法在低能量有效理论时提供了另一种观点。还简要介绍了它。
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.
