The search for an additional neutrino mass eigenstate in the 2–100 eV region from ‘Troitsk nu-mass’ data: a detailed analysis
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS(2014)
Abstract
In this paper we present the details of our previously published results for the search for an additional neutrino mass state in the beta-electron spectrum from the Troitsk nu-mass experiment. Here we present the steps of the analysis and show a set of likelihood functions obtained for each additional heavy mass value. We demonstrate how systematic errors were estimated. We also compare our results with those published recently for a similar analysis for Mainz data and try to explain why there is a factor of 2-3 difference in the sensitivity for an additional heavy mass.
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Key words
neutrino,neutrino mass,sterile neutrino,likelihood function
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