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## Main Question or Discussion Point

Hi all.

This is my first time in the Physics Forums.

I would like to ask for guidance in a calculation of a cross section of a process. I know the Feynman graph but I'm completely lost on how to start the calculation..

For example..

p p -> Z -> μμ

Many thanks in advance..

This is my first time in the Physics Forums.

I would like to ask for guidance in a calculation of a cross section of a process. I know the Feynman graph but I'm completely lost on how to start the calculation..

For example..

p p -> Z -> μμ

Many thanks in advance..