Orateur
Description
Millicharged particles (mCPs) appear in many extensions of the standard model. They are characterized by having a fractional electric charge and can be a compelling DM candidate or part of a dark sector that could solve anomalies in both particle physics and cosmology. If mCPs exist, they could be created through meson decays in accelerator facilities. Taking advantage of the low ionization threshold, and the sub-electron noise of Skipper-CCDs, the SENSEI collaboration published results with a small gram-scale detector at the neutrino beamline at Fermilab establishing this technology as an ideal candidate to advance mCP searches with dedicated, more massive experiments. In this talk, I will present the SENSEI result, and discuss other opportunities for mCP searches at accelerator facilities. I will also present the results from a new Skipper-CCD detector installed at the CMS service cavern near the interaction point of the LHC at CERN.
