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Search for Daily Modulation of MeV Dark Matter Signals with DAMIC-M

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arxiv 2307.07251 v2 pith:HYRAQQIP submitted 2023-07-14 hep-ex astro-ph.CO

I. Arnquist , N. Avalos , D. Baxter , X. Bertou , N. Castello-Mor , A.E. Chavarria , J. Cuevas-Zepeda , A. Dastgheibi-Fard
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C. De Dominicis O. Deligny J. Duarte-Campderros E. Estrada N. Gadola R. Gaior 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
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classification hep-exastro-ph.CO
keywords modulationsignaldailydarkdamic-mdatadm-electronevents
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

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. We then use these data to place exclusion limits on DM in the mass range [0.53, 2.7] MeV/c$^2$ interacting with electrons via a dark photon mediator. Taking advantage of the time-dependent signal we improve by $\sim$2 orders of magnitude on our previous limit obtained from the total rate of 1$e^-$ events, using the same data set. This daily modulation search represents the current strongest limit on DM-electron scattering via ultralight mediators for DM masses around 1 MeV/c$^2$.

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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Dark matter in simulated Milky Way analogues preferentially corotates with the baryonic disk, suppressing predicted direct-detection rates for light WIMPs, reducing directional modulation, and producing a 21% astrophy...

  2. SENSEI: A Search for Diurnal Modulation in sub-GeV Dark Matter Scattering

    hep-ex 2025-10 accept novelty 6.0 of 10

    No sidereal daily modulation is seen in SENSEI single-electron data; the 90% C.L. amplitude bound is 6.8 e−/g/day and sub-MeV dark-matter cross-section limits improve by about an order of magnitude.

  3. SPLENDOR: a novel detector platform to search for light dark matter with narrow-gap semiconductors

    physics.ins-det 2025-07 conditional novelty 6.0 of 10

    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. 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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