Name: Francesco (email_not_shown)
Date: 09/19/17-01:23:25 PM Z

My model is the following

File gen
File mod
File pars

where there is a real scalar Sk with multiderivative interactions.

When I compute the amplitude for Sk Sk > Sk SK, In the exprssion of the amplitude, I get a strange term which is called "xi" Subscript[S[ SequenceForm["Gen", 5]]. What is it?

This is the mathematica notebook

Thank you very much!

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