I tried your suggestion already and it works.
However, the result contains a lot of Passarino-Veltman integrals.
I found the definition of these integral in the manual but the terms with indices other than zero are quite complicate.
I found that we can extract these integrals by Write2 function.
However, I get nothing from this function. How to solve this problem?
Another question is are there any way to get the analytic expression directly from OneLoop result? or I have to calculate Passarino-Veltman integrals term by term.
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