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- W3099152012 abstract "Abstract We emphasize that it is extremely important for future neutrinoless double-beta ( <?CDATA $0nubetabeta$?> ) decay experiments to reach the sensitivity to the effective neutrino mass <?CDATA $|m_{betabeta}| approx 1;{rm {meV}}$?> . With such a sensitivity, it is highly possible to discover the signals of <?CDATA $0nubetabeta$?> decays. If no signal is observed at this sensitivity level, then either neutrinos are Dirac particles or stringent constraints can be placed on their Majorana masses. In this paper, assuming the sensitivity of <?CDATA $|m_{betabeta}| approx 1;{rm {meV}}$?> for future <?CDATA $0nubetabeta$?> decay experiments and the precisions on neutrino oscillation parameters after the JUNO experiment, we fully explore the constrained regions of the lightest neutrino mass <?CDATA $m_1$?> and two Majorana-type CP-violating phases <?CDATA ${rho, sigma}$?> . Several important conclusions in the case of normal neutrino mass ordering can be made. First, the lightest neutrino mass is severely constrained to a narrow range <?CDATA $m_1 in [0.7, 8];{rm {meV}}$?> , which together with the precision measurements of neutrino mass-squared differences from oscillation experiments completely determines the neutrino mass spectrum <?CDATA $m_2 in [8.6, 11.7];{rm {meV}}$?> and <?CDATA $m_3 in [50.3, 50.9];{rm {meV}}$?> . Second, one of the two Majorana CP-violating phases is limited to <?CDATA $rho in [130^circ, 230^circ]$?> , which cannot be obtained from any other realistic experiments. Third, the sum of three neutrino masses is found to be <?CDATA $Sigma equiv m_1 + m_2 + m_3 in [59.2, 72.6];{rm {meV}}$?> , while the effective neutrino mass for beta decays turns out to be <?CDATA $m_beta equiv (|U_{e1}|^2 m^2_1 + |U_{e2}|^2 m^2_2 + |U_{e3}|^2 m^2_3)^{1/2}in [8.9, 12.6];{rm {meV}}$?> . These observations clearly set up the roadmap for future non-oscillation neutrino experiments aiming to solve the fundamental problems in neutrino physics." @default.
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- W3099152012 date "2020-03-01" @default.
- W3099152012 modified "2023-10-14" @default.
- W3099152012 title "Towards the meV limit of the effective neutrino mass in neutrinoless double-beta decays *" @default.
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- W3099152012 doi "https://doi.org/10.1088/1674-1137/44/3/031001" @default.
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