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## Main Question or Discussion Point

Hi all,

Is any one familiar with FeynArts and FormCalc programmes? When I calculate a process having ## V_{CKM} ## in the couplings like ## b \to s \gamma ##, and use Insertion Level of Classes, after calculating the amplitude I get some parameters I don't understand, like

CKM[Gen4, 3], SumOver[Gen4, 3].

So what are their values ?

Bests.

Is any one familiar with FeynArts and FormCalc programmes? When I calculate a process having ## V_{CKM} ## in the couplings like ## b \to s \gamma ##, and use Insertion Level of Classes, after calculating the amplitude I get some parameters I don't understand, like

CKM[Gen4, 3], SumOver[Gen4, 3].

So what are their values ?

Bests.