Spin couplings as witnesses of Planck scale phenomenology Pasquale Bosso, Fabrizio Illuminati, Luciano Petruzziello and Fabian Wagner Eur. Phys. J. C, 85 3 (2025) 269 Published online: 11 March 2025 DOI: 10.1140/epjc/s10052-025-13941-4