Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site oddjob.UChicago.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!ihnp4!gargoyle!oddjob!matt From: matt@oddjob.UChicago.UUCP (Matt Crawford) Newsgroups: net.physics Subject: Feynman diagram question -- for experts Message-ID: <378@oddjob.UChicago.UUCP> Date: Wed, 22-Aug-84 00:03:54 EDT Article-I.D.: oddjob.378 Posted: Wed Aug 22 00:03:54 1984 Date-Received: Thu, 16-Aug-84 07:20:25 EDT Organization: U. Chicago: Astronomy & Astrophysics Lines: 7 Is there a way I can just look at a term in the interaction lagrangian and know for certain whether the corresponding vertex should have a +i or a -i multiplying the coupling? Assume, of course, that I know the spins of all the fields, and the signature of the metric being used. ___________________________________________________________ Matt University ARPA: crawford@anl-mcs.arpa Crawford of Chicago UUCP: ihnp4!oddjob!matt