Challenges at the hidden physics frontier

• Richard Jacobsson - richard.jacobsson@cern.ch (CERN)

Room: ZOOM The current situation in physics is intriguing, to say the least. Our current best knowledge, summarised in the Standard Model, shows no obvious cracks in our experimental measurements. Yet, many observed phenomena remain unexplained, neutrinos, matter-antimatter asymmetry, and dark matter being some of the most prominent. Future searches for the "new physics" that should be at the root of these are without a doubt in need of a diverse approach and experiments with a complementary sensitivity to different types of theoretical approaches. CERN strongly recognises this need and pushes ahead a diversity of experimental programmes. One among these is the ongoing decision process about the future physics programme post-LS3 in the SPS ECN3 experimental facility, for which kaon physics, searches for feebly interacting particles, and neutrino physics are considered. In this seminar I will outline the motivation for searches for feebly interacting particles at the SPS, describe the experimental challenges, and in particular show how magnets are at the forefront of the success of these programmes, calling for a joint effort on new technologies to deliver performance that is critical for the experimental measurements but also to reduce power consumption.