Göttingen 2025 – scientific programme

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T: Fachverband Teilchenphysik

T 38: Neutrino Physics III

T 38.5: Talk

Tuesday, April 1, 2025, 17:15–17:30, VG 3.103

Exploring coherent elastic neutrino-nucleus scattering: status of the NUCLEUS experiment — •Chloé Goupy for the NUCLEUS collaboration — Max Planck Institute for Nuclear Physics (MPIK), Heidelberg, Germany

The first detection of coherent elastic neutrino nucleus scattering (CEvNS) at a nuclear reactor remains to be achieved, especially because the corresponding nuclear recoils lie in the O(100 eV) energy regime which is difficult to measure with conventional detection technologies, and also because of the unfavorable background conditions nuclear power plant environments generally offer.

To overcome these obstacles, the NUCLEUS experiment aims to develop an innovative detection system using cryogenic detectors made of CaWO4 and Al2O3 crystals capable of reaching O(10 eV) energy thresholds. These target detectors will be surrounded by a twofold system of instrumented cryogenic vetoes, an external passive shielding and a muon veto to improve the identification and discrimination of backgrounds.

At present, the experiment is under commissioning in the shallow underground laboratory at the Technical University of Munich (TUM), and the relocation to the Chooz-B nuclear power plant in the French Ardennes in underway. In this talk, I will provide an overview of the experiment's current status, focusing on the latest developments and milestones achieved.

Keywords: CEvNS; Reactor neutrinos; Cryogenic detectors