Referees:

A mamma e babbo ACKNOWLEDGMENTS I would like to thank Prof. Michael Schmelling who gave me the possibility to do my PhD in this group and the Internation Max Planck Society for the fundings. I also thank the LHCb group at MPI, for the nice atmosphere, for our coffees, our Friday meetings and for not opening the windows during winter! A very warm thanks goes to the Kshh microWG, and especially to Stephan Mon-teil and Thomas Latham: this work would not have been possible without your precious help and guidance. And now I would like to thank all the people who supported me through these years. Francesca you are the first one, because I shared with you the feeling to be exile, the difficulties to live in a different country and the happiness to go back home for our holidays. Matteo for being such a bright and good physicist. Matteo and Francesca together for our Flamkuchen, our sushies and for the piece of Sardinia always here with me