Speaker
Description
Neutrinos are proven to have non-zero masses by the observation of neutrino oscillations, while the absolute neutrino mass scale is still unknown. Cosmological observations and neutrinoless double beta decay experiments put model-dependent upper limits of the neutrino mass at sub-eV level. With a precise spectroscopy of molecular tritium beta decay spectrum near the endpoint energy, the KArlsruhe TRItium Neutrino (KATRIN) experiment sets the most stringent model-independent upper bound for the absolute neutrino mass. This poster will discuss the two analysis methods used for the first five measurement campaigns. In the frequentist approach, neutrino mass is derived by a combined fit of all measurement campaigns based on a highly optimized model calculation, and the upper bound is obtained with the Lokhov-Tkachov belt construction method. In contrast, the Bayesian approach facilitates the combination of results from individual measurement campaigns and the adoption of prior information from the other observations and model predictions. We will also discuss the Bayesian sensitivity for the first five measurement campaigns, as well as its prior dependency.
| Poster prize | Yes |
|---|---|
| Given name | Weiran |
| Surname | Xu |
| First affiliation | Massachusetts Institute of Technology |
| Institutional email | weiranxu@mit.edu |
| Gender | Male |
| Collaboration (if any) | KATRIN |
