Quantum Field Theory: An Introduction to Physics Beyond the Standard Model

[planetology]

Originally posted by jeff
It's a basic result covered in every introductory course in complex analysis. Just look under analytic continuation in any complex analysis text.

Ah, I should have known Churchill could rescue me. Back in the day it always did.

Jeff and Si - thanks for all the helpful posts. Looking back at that stuff, I realize the Wick rotation was the thing that really was bugging me, and that all I needed was a slight clue. And keep lobbying for Weinberg - I may buy it yet :)

 

[gnl]

Fields

Thanks for the link to "Fields". I just downloaded it. It's huge! Never seen anything like that.

Another good set of notes is the book by Carroll on General Relativity, also on the archive.

Giuseppe

 

[tiny-tim]

Weinberg QTF Volume I free online

… not everyone has Weinberg's books. Siegel's book is online and free, so I thought it would be good …

As for a Weinberg workshop, be my guest. The only problem is that the number of people who can participate is limited by the number of people who have the book.

My reason for liking Weinberg: His approach feels much more "pure" than other books, particularly in that all axioms are simple and physically inuitive, and are introduced only when needed. Thus your knowledge doesn't get entangled, the various theorems become more powerful since they can then be extended to other theories, and theorems can be obtained more completely and generally yet made simpler. His brief yet comprehensive style helps one avoid getting confused, although sometimes he is a bit too brief!
…
By the way, don't buy all three volumes in one go! Volume one will teach you a lot about the basics, and can be read without the other two, which cover more advanced topics which no-one here (including myself) is interested in yet.

… By the way, Weinberg discusses his approach in Volume 1 in hep-th/9702027 (http://xxx.soton.ac.uk/abs/hep-th/9702027 ), with some nice caveats added.

Volume I of Weinberg's QTF is also available free online (most pages), at http://books.google.com/books?id=h9...nother book on quantum field theory"&f=false".

(It says "Volume 2" at the top, but it is Volume I! … if the above link doesn't work, do a google "Books" search for Volume 2 … that's why I've publicised the link here, since a google search for Volume I doesn't find it )