Speaker
Description
In the last years, the efforts towards finding subGeV new physics have increased. This Light Dark World is vast and unknown, however, we know that the components of different theories must live in that world. From the experimental side, there is also a great effort to disentangle and understand what could hide the Light Dark World. NA64 is a fixed target experiment at CERN SPS that search for the inhabitants of the Light Dark World using high energy electron, positron and muon beams. In this talk, we will focus on how NA64 is able to shed some light in several corners of this dark sector with the latest results on muon beam data. First of all, we will use the recent muon data to constraint for the first time the SMEFT operators that involve muon flavour. Following with EFT, we contrast the $\nu$SMEFT operators that relates muon flavour with heavy neutral leptons. And finally, we will see how muon data can tell us more about subGeV inelastic dark matter.
