Dec 15 – 16, 2022
Centre for Particle Theory, Durham
Europe/London timezone

Sensitivity of Future Tritium Decay Experiments to New Physics

Dec 15, 2022, 4:00 PM
Ph30 (zoom room 2) (Centre for Particle Theory, Durham)

Ph30 (zoom room 2)

Centre for Particle Theory, Durham

Department of Physics Durham University South Road Durham DH1 3LE
Long talk (20 mins) Full Length Talks


Frank Deppisch (UCL) James Canning (UCL HEP)


The $\beta$-decay of tritium is the most promising approach to measure the absolute masses of active light neutrinos in the laboratory and in a model-independent fashion. The development of Cyclotron Radiation Emission Spectroscopy techniques and the use of atomic tritium has the potential to improve the current limits by an order of magnitude in future tritium experiments. In this paper, we analyse the potential sensitivity of such future searches to keV-mass sterile neutrinos and exotic interactions of either the active or sterile neutrinos. We calculate the relevant decay distributions in both energy and angle of the emitted electron with respect to a potential polarisation of the tritium; we include interference with the Standard Model case as well as incorporating relevant final state corrections for atomic tritium. We present projected sensitivities on the active-sterile neutrino mixing and effective operator scales of exotic currents, demonstrating the potential to probe New Physics in tritium experiments.

Type of presentation 20 minute talk
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Primary authors

Frank Deppisch (UCL) James Canning (UCL HEP) Wenna Pei (University College London)

Presentation materials