I've got my matrix element from FeynCalc. As far as I know, FeynCalc does not do the phase space integration. So any recommended tools that I can put my matrix element into and do the (3-body) phase space integral?
(You might suggest me to use some numerical tools like MadGraph from generating the process to finally doing phase space integral. However, the matrix element was after some artificial modifications for which MadGraph is very hard to do. So modifying the matrix element in FeynCalc in advance seems a better choice.)
Thanks so much!
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