First Constraints from DAMIC-M on Sub-GeV Dark-Matter Particles Interacting with Electrons.
Phys Rev Lett
; 130(17): 171003, 2023 Apr 28.
Article
em En
| MEDLINE
| ID: mdl-37172255
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 subelectron 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 7e^{-}. With this dataset we place limits on dark matter particles of mass between 0.53 and 1000 MeV/c^{2}, excluding unexplored regions of parameter space in the mass ranges [1.6,1000] MeV/c^{2} and [1.5,15.1] MeV/c^{2} for ultralight and heavy mediator interactions, respectively.
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MEDLINE
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En
Ano de publicação:
2023
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Article