The NA62 experiment at CERN

The Branching Ratio (BR) of the rare decay K(+) -> I (+) bar nu is predicted with a small error in the framework of the standard model (SM). The contribution of long distance terms is suppressed thanks to the GIM mechanism and the short distance dynamics is almost completely described by well measured semileptonic operators. The cleanness of the SM prediction together with the small BR (~ 10(-')(10)) makes this decay an interesting opportunity to describe the presence and the contribution of the new physics using relatively low energy processes. The NA62 experiment at CERN aims at measuring O(100) events in two years of data taking with 10% background. From an experimental point of view this measurement is very challenging because the weakness of the signal signature and the huge amount of background processes. In this paper the key points of the experiment will be described after a brief introduction on theoretical aspects and present results.