First operation of the FAMU experiment at the RIKEN-RAL high intensity muon beam facility. - Adamczak, A.; Bakalov, D.; Baldazzi, G.; Baruzzo, M.; Benocci, R.; Bertoni, R.; Bonesini, M.; Capra, S.; Cirrincione, D.; Clemenza, M.; Colace, L.; Danailov, M.; et al. (European Physical Journal A -- Hadrons & Nuclei, 2025)