Neutrino oscillations and signals in β and 0ν2β experiments

2002/01/31 by Ferruccio Feruglio, Alessandro Strumia, Francesco Vissani · 26 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Degenerate energy levels #MAJORANA #Neutrino #Neutrino Physics Research #Neutrino oscillation #Oscillation (cell signaling) #Particle physics theoretical and experimental studies #Range (aeronautics) #hep-ex #hep-ph

paper · pdf · doi:10.1016/s0550-3213(02)00345-0

published as Nucl.Phys.B637:345-377,2002; Addendum-ibid.B659:359-362,2003 · 30 pages, 12 figures. Version 2: footnote at page 21 added. Version 3: updated including SNO NC data. Version 4: addendum about KamLAND data at pages 25,26,27. Version 5: addendum about SNO salt data at pages 28,29,30

openalex publication_date 2002/08/01 · arxiv created 2003/10/21 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Assuming Majorana neutrinos, we infer from oscillation data the expected values of the parameters m_nue and m_ee probed by beta and 0nu2beta-decay experiments. If neutrinos have a `normal hierarchy' we get the 90% CL ranges |m<sub>ee</sub>| = (0.7 - 4.6) meV, and discuss in which cases future experiments can test this possibility. For `inverse hierarchy', we get |m_ee| = (12 - 57) meV and m_νe = (40 - 57) meV. The 0nu2beta data imply that almost degenerate neutrinos are lighter than 1.05 h eV at 90% CL, competitive with the beta-decay bound. We critically reanalyse the data that were recently used to claim an evidence for 0nu2beta, and discuss their implications. Finally, we review the predictions of flavour models for m_ee and theta₁₃.

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