Abstract
We study the effect of exotic charged current interactions on the electron energy spectrum in tritium decay, focussing on the KATRIN experiment and a possible modified setup that has access to the full spectrum. Both sub-eV and keV neutrino masses are considered. We perform a fully relativistic calculation and take all possible new interactions into account, demonstrating the possible sizable distortions in the energy spectrum.
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Ludl, P.O., Rodejohann, W. Direct neutrino mass experiments and exotic charged current interactions. J. High Energ. Phys. 2016, 40 (2016). https://doi.org/10.1007/JHEP06(2016)040
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DOI: https://doi.org/10.1007/JHEP06(2016)040