Probing Benchmark Models of Hidden-Sector Dark Matter with DAMIC-M

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90263%2F25%3A00390554" target="_blank" >RIV/68407700:90263/25:00390554 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/2tcc-bqck" target="_blank" >https://doi.org/10.1103/2tcc-bqck</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/2tcc-bqck" target="_blank" >10.1103/2tcc-bqck</a>

Result language
angličtina
Original language name
Probing Benchmark Models of Hidden-Sector Dark Matter with DAMIC-M
Original language description
We report on a search for sub-GeV dark matter (DM) particles interacting with electrons using the DAMIC-M prototype detector at the Modane Underground Laboratory. The data feature a significantly lower detector single e- rate (factor 50) compared to our previous search, while also accumulating a 10 times larger exposure of ~1.3 kg-day. DM interactions in the skipper charge-coupled devices (CCDs) are searched for as groups of two or three adjacent pixels with a total charge between 2 and 4 e-. We find 144 candidates of 2 e- and 1 candidate of 4 e-, where 141.5 and 0.071, respectively, are expected from background. With no evidence of a DM signal, we place stringent constraints on DM particles with masses between 1 and 1000 MeV/c2 interacting with electrons through an ultralight or heavy mediator. For large ranges of DM masses below 1 GeV/c2, we exclude theoretically motivated benchmark scenarios where hidden-sector particles are produced as a major component of DM in the Universe through the freeze-in or freeze-out mechanisms.
Czech name
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Czech description
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Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
10304 - Nuclear physics

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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