At the root of things
arXiv:0906.4955
Abstract
Modern theories of fundamental interactions describe strong, electromagnetic and weak interactions as quantum field theories with certain kinds of embedded internal symmetries called `gauge symmetries'. This article introduces quantum field theories and gauge symmetries to the uninitiated.
LaTeX, 22 pages, requires axodraw.sty. A small error has been corrected in this version. Journal reference was also wrong in the previous version