English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

If future neutrino oscillation experiments show that the neutrino massspectrum is with normal ordering, m1 < m2 < m3, and the searches forneutrinoless double beta-decay with sensitivity to values of the effectiveMajorana mass |<m>| > 0.01 eV give negative results, the next frontier in thequest for neutrinoless double beta-decay will correspond to |<m>| ~ 0.001 eV.Assuming that massive neutrinos are Majorana particles and their exchange isthe dominant mechanism generating neutrinoless double beta-decay, we analisethe conditions under which |<m>|, in the case of three neutrino mixing andneutrino mass spectrum with normal ordering, would satisfy |<m>| > 0.001 eV. Weconsider the specific cases of i) normal hierarchical neutrino mass spectrum,ii) of relatively small value of the CHOOZ angle theta13 as well as iii) thegeneral case of spectrum with normal ordering, partial hierarchy and a value oftheta13 close to the existing upper limit. We study the ranges of the lightestneutrino mass m1 and/or of sin^2 theta13, for which |<m>|> 0.001 eV and discussthe phenomenological implications of such scenarios. We provide also anestimate of |<m>| when the three neutrino masses and the neutrino mixingoriginate from neutrino mass term of Majorana type for the (left-handed)flavour neutrinos and m1 Ue1^2 + m2 U_e2^2 + m3 Ue3^2 =0, but there does notexist a symmetry which forbids the neutrinoless double beta-decay.

Majorana Neutrinos, Neutrino Mass Spectrum and the || ~ 0.001 eV Frontier in Neutrinoless Double Beta Decay