Dangers of Unphysical Regions
Matts Roos, Leonid A. Khalfin
Abstract
We discuss the appearance of negative numbers of events in radiochemical experiments and negative squared antineutrino mass m2νe in tritium beta decay. Going beyond the standard discussion about how to extract upper limits in those cases, we show that the problem is much more profound. We explain the circumstances which are the likely cause of the persistently negative values of m2νe in all modern tritium beta decay experiments.
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