Toward inertial sensing with a 23S positronium beam Sebastiano Mariazzi, Ruggero Caravita, Michael Doser, Giancarlo Nebbia and Roberto S. Brusa Eur. Phys. J. D, 74 4 (2020) 79 Published online: 22 April 2020 DOI: 10.1140/epjd/e2020-100585-8