Name: Sameer Aroon Walawalkar (email_not_shown)
Date: 06/20/03-08:52:20 PM Z


Hi,

I am trying to use feyncalc to do an explicit sum over trace of the
generators of SU(3). Something like the following (which does not work).

-------------------------------------------------------------
In[1]:=
<<HighEnergyPhysics`FeynCalc`

In[2]:=

l1 = SUNT[a].SUNT[a]

In[3]:=

l2 = SUNTrace[l1]

Out[3]=
\!\(\*FormBox[
  FractionBox[
    SubscriptBox["\[Delta]",
      RowBox[{
        FormBox[
          FormBox["a",
            "TraditionalForm"],
          "TraditionalForm"], "\[NoBreak]",
        FormBox[
          FormBox["a",
            "TraditionalForm"],
          "TraditionalForm"]}]], "2"], TraditionalForm]\)
---------------------------------------------------------------

How can I use feyncalc to actually do this explicit sum over trace for
SU(3) and give me output 4 at the end

thanks,
sameer



This archive was generated by hypermail 2b29 : 10/23/17-12:20:01 AM Z CEST