Sterile Neutrino Searches at KATRIN
ORAL
Abstract
The Karlsruhe Tritium Neutrino experiment (KATRIN) sets the most stringent constraint on the effective neutrino mass by performing a precision measurement of the tritium β-decay spectrum. Searches for a kink-like structure in the spectrum investigate neutrino mixing to additional right-handed or sterile neutrinos.
Analysis of the endpoint region of the spectrum used to constrain the neutrino mass also allows for investigations of neutrino mixing to sterile neutrinos of m4 up to 40 eV. Searches for keV sterile neutrinos require measurement of the full tritium β-decay spectrum, with a measurement of 1016 electrons being statistically sensitive to an active-to-sterile mixing of sin2(θ)<10-6. To this end, the TRISTAN silicon drift detector and readout is being developed for installation in the KATRIN beamline to perform a high rate differential measurement of the spectrum.
In this talk the sensitivity to a light sterile neutrino signature of the first five KATRIN neutrino mass campaigns is presented in the context of other results and anomalies within the parameter space. The status of production and characterization of the TRISTAN detector is presented along with the ongoing modeling effort for optimized detector integration in the KATRIN beamline.
Analysis of the endpoint region of the spectrum used to constrain the neutrino mass also allows for investigations of neutrino mixing to sterile neutrinos of m4 up to 40 eV. Searches for keV sterile neutrinos require measurement of the full tritium β-decay spectrum, with a measurement of 1016 electrons being statistically sensitive to an active-to-sterile mixing of sin2(θ)<10-6. To this end, the TRISTAN silicon drift detector and readout is being developed for installation in the KATRIN beamline to perform a high rate differential measurement of the spectrum.
In this talk the sensitivity to a light sterile neutrino signature of the first five KATRIN neutrino mass campaigns is presented in the context of other results and anomalies within the parameter space. The status of production and characterization of the TRISTAN detector is presented along with the ongoing modeling effort for optimized detector integration in the KATRIN beamline.
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Publication: Development of a Silicon Drift Detector Array to Search for keV-scale Sterile Neutrinos with the KATRIN Experiment, 2024 J. Phys. G: Nucl. Part. Phys. 51 085202
Presenters
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Andrew Suiter Gavin
University of North Carolina at Chapel Hill
Authors
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Andrew Suiter Gavin
University of North Carolina at Chapel Hill