Search for keV-scale sterile neutrinos with the first KATRIN data M. Aker, D. Batzler, A. Beglarian, J. Behrens, A. Berlev, U. Besserer, B. Bieringer, F. Block, S. Bobien, B. Bornschein et al. (120 more) Eur. Phys. J. C, 83 8 (2023) 763 Published online: 29 August 2023 DOI: 10.1140/epjc/s10052-023-11818-y