Ponente
Descripción
The quest for feebly or weakly interacting particles (FIPs) arising in low-scale New Physics (NP) scenarios is a very active topic. NA64 is a world-reference fixed target experiment at CERN searching for FIPs in the scattering of electron, positron and muons on a target. Several and well-motivated NP scenarios suggest FIPs particles preferably coupled to muons as: Z' bosons in $L_{\mu}-L_{\tau}$ models as one of the remaining explanation of the g-2 anomaly and the DM puzzle; Dark Photons as a portal to DM with masses above 300 MeV which are neither accessible with electron or positron beams; FIPs can also mediate Lepton Flavour Violation (LFV) processes such as μN → τX or μN → eX conversion processes and many more as scalar, ALPs, millicharged particles,… The goal of NA64μ is to search for FIPs using the unique high energy and high intensity muon beam at CERN SPS. In this talk, I will describe the first published results recently using $1.98\times10^{10}$ muons on target and the future prospects of the experiment.
