- #1
pierrechevalier
- 1
- 0
Hello everybody,
I have to calculate the matrix element of the process gg-->ttbar-->lnub lnub (ttbar dileptonic decay) using FORM.
I have three feynman dyagrams for such a process. When I calculate the interference term i have as output thousands of terms with Levi civita tensors inside (but with the indeces correctly contracted). I have already used the "symmetrize" option as explained in the tutorial
http://www.nikhef.nl/~form/maindir/documentation/documentation.html
but it doesn't work.
Can someone help me?
It is the first time in this forum, i do not know exactly how it works, so i leave my email
cavaller[at]lpnhe[dot]in2p3[dot]fr
Thanks a lot
Pierrechevalier
I have to calculate the matrix element of the process gg-->ttbar-->lnub lnub (ttbar dileptonic decay) using FORM.
I have three feynman dyagrams for such a process. When I calculate the interference term i have as output thousands of terms with Levi civita tensors inside (but with the indeces correctly contracted). I have already used the "symmetrize" option as explained in the tutorial
http://www.nikhef.nl/~form/maindir/documentation/documentation.html
but it doesn't work.
Can someone help me?
It is the first time in this forum, i do not know exactly how it works, so i leave my email
cavaller[at]lpnhe[dot]in2p3[dot]fr
Thanks a lot
Pierrechevalier