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First Constraints from DAMIC-M on Sub-GeV Dark-Matter Particles Interacting with Electrons

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arxiv 2302.02372 v2 pith:KRTAZ7YF submitted 2023-02-05 hep-ex astro-ph.CO

I. Arnquist , N. Avalos , D. Baxter , X. Bertou , N. Castello-Mor , A.E. Chavarria , J. Cuevas-Zepeda , J. Cortabitarte Gutierrez
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J. Duarte-Campderros A. Dastgheibi-Fard O. Deligny C. De Dominicis E. Estrada N. Gadola R. Ga{i}or T. Hossbach L. Iddir L. Khalil B. Kilminster A. Lantero-Barreda I. Lawson S. Lee A. Letessier-Selvon P. Loaiza A. Lopez-Virto A. Matalon S. Munagavalasa K. McGuire P. Mitra D. Norcini G. Papadopoulos S. Paul A. Piers P. Privitera K. Ramanathan P. Robmann M. Settimo R. Smida R. Thomas M. Traina I. Vila R. Vilar G. Warot R. Yajur J-P. Zopounidis
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classification hep-exastro-ph.CO
keywords darkdamic-mparticleschargeconstraintscurrentelectronsfirst
verification ladder T0 review T1 audit T2 compute T3 formal
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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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Forward citations

Cited by 5 Pith papers

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  1. Ubiquitous Corotation of Dark Matter Halos: Implications for Direct Detection

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    A dark matter detector platform combining a 60 meV-gap semiconductor (Eu5In2Sb6) with cryogenic HEMT readout and daily modulation analysis is presented, with projected sensitivity to sub-MeV dark matter.

  4. Unconventional Materials for Light Dark Matter Detection

    hep-ph 2025-07 conditional novelty 6.0 of 10

    TiSe2, Sr2RuO4, and hole-doped diamond are projected to improve sub-MeV dark matter detection reaches by one to three orders of magnitude over existing proposals, with directional sensitivity from their anisotropic responses.

  5. Constraints on Sub-MeV Dark Matter from Solar Reflection with DAMIC-M

    hep-ex 2026-07 conditional novelty 5.5 of 10

    With ~1.3 kg-day of DAMIC-M skipper-CCD data, solar-reflected dark matter yields 90% CL limits on the DM-electron cross section reaching 3.16e-37 cm2 at 0.1 MeV for an ultralight mediator.

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