Can the Negative Mass Square of the Electron Neutrinos BE AN Indication of Interaction with Relic Neutrinos?

Astronomy and Astrophysics – Astronomy

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Scientific paper

The unphysical result of the negative mass square of the electron neutrinos recently reported in several tritium β-decay experiments, is one of the most attractive subjects. As a possible scenario to explain the anomaly, we have assumed a reaction with relic neutrinos which are predicted by the standard big bang cosmology. If such neutrinos could exist, the interaction of the relic neutrinos with the target tritium, νe + 3H → 3He + e- could be laid under the large amount of the β-decay process, H- > He + e- + bar ν e, which would cause a peak-like structure beyond the end-point in the Kurie plot. Based on the assumption, we evaluated the cross section from the event rate found in the peak by re-fitting to the 1991 data published by Mainz Group. In this talk we will provide a scenario that could account for the evaluated cross section by assuming a coherent state of the neutrino sea, which would result much lower temperature than the prediction from the standard big bang cosmology.

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