well ..., do you really need open color lines?
Usually color indices are contracted, so that a calculation will give a color factor.
Maybe it better to calculate color factors separately.
I did have some trougle implementing SU(N)xSU(2), i.e., it is non-trivial to mimick SUNT's and DiracGamma's with the same
This archive was generated by hypermail 2b29 : 10/15/18-11:40:01 AM Z CEST