English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Dark Matter (DM) particles with sufficiently large cross sections may scatteras they travel through Earth's bulk. The corresponding changes in the DM fluxgive rise to a characteristic daily modulation signal in detectors sensitive toDM-electron interactions. Here, we report results obtained from the firstunderground operation of the DAMIC-M prototype detector searching for such asignal from DM with MeV-scale mass. A model-independent analysis finds nomodulation in the rate of 1$e^-$ events with periods in the range 1-48 h. Wethen 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. Takingadvantage of the time-dependent signal we improve by $\sim$2 orders ofmagnitude on our previous limit obtained from the total rate of 1$e^-$ events,using the same data set. This daily modulation search represents the currentstrongest limit on DM-electron scattering via ultralight mediators for DMmasses around 1 MeV/c$^2$.

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