Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

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.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# FeynArts & FormCalc

Tags:

**Physics Forums - The Fusion of Science and Community**