A measurement of absolute efficiency of the ARAPUCA photon detector in liquid argon. (5th June 2020) - Totani, D.; Cancelo, G.; Cavanna, F.; Escobar, C.O.; Kemp, E.; Marinho, F.; Paulucci, L.; Phan, D.D.; Mufson, S.; Macias, C.; Warner, D.