Constraining light thermal inelastic dark matter with NA64 Martina Mongillo, Asli Abdullahi, Benjamin Banto Oberhauser, Paolo Crivelli, Matheus Hostert, Daniele Massaro, Laura Molina Bueno and Silvia Pascoli Eur. Phys. J. C, 83 5 (2023) 391 Published online: 10 May 2023 DOI: 10.1140/epjc/s10052-023-11536-5