Matchete`
Matchete`

ExtMom

ExtMom[μ,Ext[field,no]] denotes the momentum pμ of the external field Ext[field,no] with Lorentz index μ, where field is the label of the field and no is its numbering in a vertex.

Examples

Basic Examples  (1)

The external momenta are printed using NiceForm as:

A superscript from the numbering of the field is included to distinguish different momenta.

Tech Notes
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