The axion is a hypothetical pseudoscalar particle that arises from the Peccei-Quinn solution for the strong CP problem and simultaneously be a strong candidate for dark matter. Recent early-universe simulations for the post-inflation scenario have indicated a preference for a higher mass corresponding to above 10 GHz. This has motivated efforts to probe this high frequency regime that...
Coherent Elastic neutrino Nucleus Scattering at spallation sources such as the ESS, offer new exciting possibilities to also study physics beyond the standard model in a small scale experiment. There is an ongoing effort att Lund and Uppsala universities to explore these possibilities in more detail. As an example, I will describe the possibility to search for the X17 - a hypothetical light...
