GoSam: a tutorial. Automating 1-loop and NLO Calculations

G. Luisoni, CERN

Thanks to automation, in the last decade, a large number of very
complex NLO calculations were computed for three, four and higher
multiplicities final states. GoSam is one of the existing codes
allowing to perform such calculations in a fully automated way. In
this hands-on tutorial the code will be presented and some
applications will be shown. The participants will have time to try and
run a few examples.