13,162 research outputs found
Extracting Majorana Properties in the Throat of Neutrinoless Double Beta Decay
Assuming that neutrinos are Majorana particles, we explore what information
can be inferred from future strong limits (i.e. non-observation) for
neutrinoless double beta decay. Specifically we consider the case where the
mass hierarchy is normal and the different contributions to the effective mass
partly cancel. We discuss how this fixes the two
Majorana CP phases simultaneously from the Majorana Triangle and how it limits
the lightest neutrino mass within a narrow window. The two Majorana CP
phases are in this case even better determined than in the usual case for
larger . We show that the uncertainty in these
predictions can be significantly reduced by the complementary measurement of
reactor neutrino experiments, especially the medium baseline version
JUNO/RENO-50. We also estimate the necessary precision on to infer non-trivial Majorana CP phases and the upper limit
\langle m \rangle_{ee} \lesssim 1\,\mbox{meV} sets a target for the design of
future neutrinoless double beta decay experiments.Comment: 21 pages, 10 figure
JUNO and Neutrinoless Double Beta Decay
We study the impact of the precision determination of oscillation parameters
in the JUNO experiment on half-life predictions for neutrinoless double beta
decay. We show that the solar neutrino mixing angle can be measured by JUNO
with below 1% uncertainty. This implies in particular that the minimal value of
the effective mass in the inverted mass ordering will be known essentially
without uncertainty. We demonstrate that this reduces the range of half-life
predictions in order to test this value by a factor of two. The remaining
uncertainty is caused by nuclear matrix elements. This has important
consequences for future double beta decay experiments that aim at ruling out
the inverted mass ordering or the Majorana nature of neutrinos.Comment: 11 pages, 7 figure
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