FeynAmpDenominatorSplit[expr] splits all FeynAmpDenominator[a,b, ...] in expr into FeynAmpDenominator[a]*FeynAmpDenominator[b] ... . FeynAmpDenominatorSplit[expr, q1] splits all FeynAmpDenominator in expr into a product of two, one containing q1 and other momenta, the second without q1.
See also: FeynAmpDenominatorCombine.
The FeynCalc Book | FeynAmpDenominatorSimplify | FeynCalc2FORM |