Speaker
Description
BULLKID-DM is an experiment for the direct detection of dark matter particles with mass of the order of 1 GeV. It exploits phonon-mediated kinetic inductance detectors (KID), arranged in carved silicon wafers, for a total mass of around 800 g and energy threshold below 200 eV. The sensitivity of the detector can be further increased with a dedicated analysis, exploiting the phonon leakage between pixels and combining the waveforms in different sensors. To this aim, pulse processing algorithms have been developed, like a multidimensional matched filter able to lower the energy resolution using the noise correlation between the KIDs. This technique has been implemented for a recent analysis of a physical run in the above-ground laboratory in Sapienza University of Rome, and proved effective in lowering the energy threshold and reducing the background rate at the lowest energies. The general results of this novel analysis procedure are discussed, alongside possible implications regarding dark matter searches.