학술논문
First Constraints from DAMIC-M on Sub-GeV Dark-Matter Particles Interacting with Electrons
Document Type
Working Paper
Author
Arnquist, I.; Avalos, N.; Baxter, D.; Bertou, X.; Castello-Mor, N.; Chavarria, A. E.; Cuevas-Zepeda, J.; Gutierrez, J. Cortabitarte; Duarte-Campderros, J.; Dastgheibi-Fard, A.; Deligny, O.; De Dominicis, C.; Estrada, E.; Gadola, N.; Gaıor, R.; Hossbach, T.; Iddir, L.; Khalil, L.; Kilminster, B.; Lantero-Barreda, A.; Lawson, I.; Lee, S.; Letessier-Selvon, A.; Loaiza, P.; Lopez-Virto, A.; Matalon, A.; Munagavalasa, S.; McGuire, K.; Mitra, P.; Norcini, D.; Papadopoulos, G.; Paul, S.; Piers, A.; Privitera, P.; Ramanathan, K.; Robmann, P.; Settimo, M.; Smida, R.; Thomas, R.; Traina, M.; Vila, I.; Vilar, R.; Warot, G.; Yajur, R.; Zopounidis, J-P.
Source
Subject
Language
Abstract
We report constraints on sub-GeV dark matter particles interacting with electrons from the first underground operation of DAMIC-M detectors. The search is performed with an integrated exposure of 85.23 g days, and exploits the sub-electron charge resolution and low level of dark current of DAMIC-M Charge-Coupled Devices (CCDs). Dark-matter-induced ionization signals above the detector dark current are searched for in CCD pixels with charge up to 7 e-. With this data set we place limits on dark matter particles of mass between 0.53 and 1000 MeV/c2, excluding unexplored regions of parameter space in the mass ranges [1.6,1000] MeV/c2 and [1.5,15.1] MeV/c2 for ultra-light and heavy mediator interactions, respectively.