I Arnquist, N Avalos, D Baxter, X Bertou, N Castelló-Mor, A E Chavarria, J Cuevas-Zepeda, A Dastgheibi-Fard, C De Dominicis, O Deligny, J Duarte-Campderros, E Estrada, N Gadola, R Gaïor, T Hossbach, L Iddir, B J Kavanagh, B Kilminster, A Lantero-Barreda, I Lawson, S Lee, A Letessier-Selvon, P Loaiza, A Lopez-Virto, K J McGuire, P Mitra, S Munagavalasa, D Norcini, S Paul, A Piers, P Privitera, P Robmann, S Scorza, M Settimo, R Smida, M Traina, R Vilar, G Warot, R Yajur, J-P Zopounidis
Dark matter (DM) particles with sufficiently large cross sections may scatter as they travel through Earth's bulk. The corresponding changes in the DM flux give rise to a characteristic daily modulation signal in detectors sensitive to DM-electron interactions. Here, we report results obtained from the first underground operation of the DAMIC-M prototype detector searching for such a signal from DM with MeV-scale mass. A model-independent analysis finds no modulation in the rate of 1 e^{-} events with sidereal period, where a DM signal would appear...
March 8, 2024: Physical Review Letters