The exact relativistic form for the β decay endpoint spectrum is derived and presented in a simple factorized form. We show that our exact formula can be well approximated to yield the endpoint form used in the fit method of the KATRIN Collaboration. We also discuss the three-neutrino case and how information from neutrino oscillation experiments may be useful in analyzing future β decay endpoint experiments.
ASJC Scopus subject areas
- Nuclear and High Energy Physics