Effects from Changes in the Final State Spectrum on the Neutrino Mass Determination from $T_{2}$ Beta Decay Experiments

10 June 1996

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 76 (24) , 4476-4479
https://doi.org/10.1103/physrevlett.76.4476

Abstract

Some improvements in the final state spectrum of

T_{2}

β

decay are discussed. Their importance for neutrino mass determination has been estimated through numerical experiments. Results depend most strongly on the length of the energy interval of the experimental spectrum used in the fit to the theoretical spectrum. For a Gaussian resolution function and fit intervals to 1.1 keV below the end point energy physically plausible changes in the final state distribution could contribute as much as

- 30 {eV}^{2}

to the systematic error in

m_{ν}^{2}

. A wider resolution function can increase this error by a factor of 2 or 3. An improved final state spectrum for neutrino mass determination is presented.

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Effects from Changes in the Final State Spectrum on the Neutrino Mass Determination fromT2Beta Decay Experiments

Abstract

Effects from Changes in the Final State Spectrum on the Neutrino Mass Determination from $T_{2}$ Beta Decay Experiments