Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 74: Neutrino Physics without Accelerators 5

T 74.2: Talk

Wednesday, March 23, 2022, 16:35–16:50, T-H33

Novel constraints on neutrino physics beyond the standard model from the Conus experiment — •Thomas Rink for the CONUS collaboration — Max-Planck-Institut für Kernphysik (MPIK)

The detection of coherent elastic neutrino-nucleus scattering (CEνNS) opens up new opportunities for neutrino physics within and beyond the standard model. As a leading reactor experiment, Conus aims for an observation in the fully coherent regime with antineutrinos emitted from the powerful 3.9 GW_th reactor of the nuclear power plant in Brokdorf (Germany). In particular, the application of ultra-low threshold, high-purity germanium detectors within a compact shield design in close vicinity to a nuclear reactor core describes the next milestone towards high-statistics neutrino physics. The acquired and future Conus data sets allow investigations of yet undetected neutrino channels and electromagnetic properties. Moreover, measurements of the Weinberg angle with neutrinos at the MeV-scale and analyses of the high energy part of a reactor’s antineutrino emission spectrum become possible with CEνNS. This talk deals with constraints on beyond the standard model neutrino phenomenology that are obtained from data collected between April 2018 and June 2019. Bounds on non-standard neutrino-quark interactions of vector and tensor type from CEνNS are presented. Further, the parameter space of simplified scalar and vector mediators that is probed by CEνNS and elastic neutrino-electron scattering is discussed. Finally, limits on an effective neutrino magnetic moments and an effective neutrino millicharge are given.