Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Astroparticle Physics I

HK 21.2: Group Report

Monday, March 28, 2022, 16:30–17:00, HK-H10

Detecting CEνNS and beyond with the CONUS reactor neutrino experiment — •Aurelie Bonhomme for the CONUS collaboration — Max Planck Institut für Kernphysik (MPIK), Heidelberg

The detection of neutrinos through coherent elastic neutrino-nucleus scattering (CEνNS) process opens a new window to study the fundamental properties of this elusive particle and to probe physics beyond the Standard Model. The CONUS experiment - operational since April 2018 - is located at 17m from the 3.9GW_th core of the nuclear power plant Brokdorf (Germany) and aims to detect CEνNS in the fully coherent regime with four 1 kg-sized HPGe point-contact detectors with a ∼300eV_ee energy threshold. The full spectral analysis of the first CONUS dataset allowed to set the current best limit on CEνNS with reactor antineutrinos and to bring competitive limits on physics beyond the standard model, such as non-standard neutrino interactions or neutrino magnetic moment. These new results will be presented in this talk. Furthermore, a special emphasis will be put on the strategy followed by the collaboration to further reduce the uncertainties, in particular via a dedicated measurement of the ionization quenching factor of nuclear recoils in germanium.