Mathematica Calculating traces with FeynCalc

Evaluating a trace coming from a Feynman diagrams with the assumptions that all particles are massless
Hello everybody!

I need a little help with FeynCalc. I think the problem is really simple but I can't find how to fix it.
I want to evaluate a trace coming from a Feynman diagram. Since the particles are all massless, I want to impose the condition on the momentum ##p^2=k^2=p'^2=0##.
I've attached the code in txt file.
I've tried everything I've found on the net(Simplify, Assumption, Refine, DotSimplify, DotSimplifyRelation, /. , ecc.)
Thank you in advance!


Want to reply to this thread?

"Calculating traces with FeynCalc" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving