# Quantum Field Theory cross sections integrals

Where can I find some examples of cross sections calculations in QFT done step-by-step? Those integrals are a little horror. For example - a simple scalar+scalar -> scalar+scalar at the tree level in a theory scalar $\phi^4$ ?

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• Take a look at M.Srednicki, "Quantum field theory". He is doing it in a very detailed manner. – Igor Ivanov Nov 10 '10 at 12:49