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  What is the defintion of a current-current diagram?

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Right now I am facing some Feynman diagram calculations and in the instructions I am reading the phrase current-current diagram appears quite often so I wanted to know:

What is the definition of a current-current diagram?

This post imported from StackExchange Physics at 2015-11-01 19:20 (UTC), posted by SE-user Knowledge
asked Jul 17, 2015 in Theoretical Physics by Knowledge (15 points) [ no revision ]
retagged Nov 1, 2015

1 Answer

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A current-current diagram is a diagram in the diagrammatic expansion of a current-current amplitude. For the latter, see. e.g., equation (1.1) in

Keith Hamilton, The Standard Model Part II: Charged Current weak interactions I, http://www.hep.ucl.ac.uk/~campanel/Post_Grads/2013-2014/SM-CC-Weak-Interactions-I.pdf

This post imported from StackExchange Physics at 2015-11-01 19:20 (UTC), posted by SE-user Arnold Neumaier
answered Jul 25, 2015 by Arnold Neumaier (15,787 points) [ no revision ]

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