Skipper CCDs for the search of a daily modulation of Dark Matter signal in the DMSQUARE experiment

NICOLAS AVALOS; HORACIO ARNALDI; IGNACIO ARTOLA; BERTOU, XAVIER; EZEQUIEL ESTRADA; MARIANO GOMEZ BERISSO; MARIA BELEN LOVINO; MATIAS MANTINAN; MIGUEL SOFO HARO; JAVIER TIFFENBERG; JUAN ESTRADA; T-T YU ; ROUVEN ESSIG; TIMON EMKEN

Conferencia; 17th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2021); 2021

The Dark Matter Daily Modulation experiment (DMSQUARE) seeks for darkmatter interactions with a Skipper CCD. It is currently running at surface level in Bariloche,Argentina, and will be moved to a shallow underground site at Sierra Grande, Argentina inNovember 2021. The low threshold achieved by Skipper CCDs allows to search for electron recoilevents with an ionization energy down to 1.2 eV. In order to extract a potential dark mattersignal from noise at the single electron level, we propose to search for a diurnal modulation ofevents, resulting from the potential interaction of the dark matter wind with the particles in theEarth. Depending on the model, mass and cross-section, this modulation can be maximum at40 deg of latitude in the Southern Hemisphere, where DMSQUARE is operated. In this articlewe present the experiment, report preliminary results with a prototype Skipper CCD takingdata at surface level and comment on future prospects.