Speaker
Description
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) aims to detect the coherent elastic scattering of reactor antineutrinos (CEvNS) using fully depleted high-resistivity charge coupled devices (CCDs). The detector is located at a distance of 30 m from the core of the 3.8 GW Angra-2 nuclear reactor in Rio de Janeiro, Brazil. With an active mass of 50 g, a readout noise better than 2 e- RMS and using data from 2016-2018, it was possible to set a 95% C.L. upper limit on the coherent scattering rate, which was used to place stringent constraints on simplified extensions of the Standard Model with light mediators. During 2019 and 2020 new data was acquired using a hardware re-binning approach in order to achieve a better signal-to-noise ratio, lowering the energy threshold to 50 eV. In this presentation we will report on the results of the blind analysis using this data. Moreover, the experiment has recently been upgraded to host 2 skipper CCDs that are operating with a readout noise lower than 0.2 e- RMS in a very stable mode. The performance of these detectors and prospects for detecting CEvNS with the skipper technology will be also discussed.
