Impact of an eV-mass sterile neutrino on the neutrinoless double-beta decays: A Bayesian analysis

Huang, Guo-yuan; Zhou, Shun

doi:10.1016/j.nuclphysb.2019.114691

Cited by 15 publications

(14 citation statements)

References 109 publications

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“…Strictly speaking, one should perform a statistical analysis of the experimental sensitivities to neutrino masses and the Majorana CP phases [34][35][36][37]. However, we have found that the final results are quite consistent with the simple analysis in the present paper.…”

Section: Discussionsupporting

confidence: 82%

Towards the meV limit of the effective neutrino mass in neutrinoless double-beta decays *

Cao

Huang

et al. 2020

Chinese Phys. C

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In this paper, we emphasize why it is important for future neutrinoless double-beta (0νββ) decay experiments to reach the sensitivity to the effective neutrino mass |m ββ | ≈ 1 meV. Assuming such a sensitivity and the precisions on neutrino oscillation parameters after the JUNO experiment, we fully explore the constrained regions of the lightest neutrino mass m 1 and two Majorana-type CP-violating phases {ρ, σ}. The implications for the neutrino mass spectrum, the effective neutrino mass m β in beta decays and the sum of three neutrino masses Σ ≡ m 1 + m 2 + m 3 relevant for cosmological observations are also discussed. *

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Section: Discussionsupporting

confidence: 82%

Towards the meV limit of the effective neutrino mass in neutrinoless double-beta decays *

Cao

Huang

et al. 2020

Chinese Phys. C

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“…For the similar analysis relevant for the effective neutrino masses in β and 0νββ decays, see Refs. [29][30][31][32][33][34][35]. Here we perform an updated analysis for the direct neutrino mass experiments, in light of a good number of experimental achievements.…”

Section: Posterior Distributionsmentioning

confidence: 99%

Effective neutrino masses in KATRIN and future tritium beta-decay experiments

2020

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Past and current direct neutrino mass experiments set limits on the so-called effective neutrino mass, which is an incoherent sum of neutrino masses and lepton mixing matrix elements. A classical form of the electron energy spectrum is often assumed. Alternative definitions of effective masses exist, and an exact relativistic spectrum is calculable. We quantitatively compare the validity of those different approximations as function of energy resolution and exposure in view of tritium beta decays in the KATRIN, Project 8 and PTOLEMY experiments. Furthermore, adopting the Bayesian approach, we present the posterior distributions of the effective neutrino masses by including current experimental information from neutrino oscillations, beta decay, neutrinoless double-beta decay and cosmological observations. Both linear and logarithmic priors for the smallest neutrino mass are assumed. *

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“…To accommodate an eV scale sterile-like neutrino N 1 , with lepton number violating (LNV) Majorana mass manifest the new physics contribution beyond SM [85][86][87][88]. The well known process of NDBD includes the simultaneous decay of two neutrons from the nucleus of an isotope (A, Z ) into two protons and two electrons without the emission of any neutrinos in the final state [89][90][91][92][93],…”

Section: Discussion On Neutrinoless Double Beta Decay With Ev-scale Nmentioning

confidence: 99%

Neutrino phenomenology and dark matter in an $$A_4$$ flavour extended $$B-L$$ model

et al. 2020

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We present an A 4 flavor extended B − L model for realization of eV scale sterile neutrinos, motivated by the recent experimental hints from both particle physics and cosmology. The framework considered here is a gauged B − L extension of standard model without the introduction of righthanded neutrinos, where the gauge triangle anomalies are canceled with the inclusion of three exotic neutral fermions N i (i = 1, 2, 3) with B − L charges − 4, − 4 and 5. The usual Dirac Yukawa couplings between the SM neutrinos and the exotic fermions are absent and thus, the model allows natural realization of eV scale sterile-like neutrino and its mixing with standard model neutrinos by invoking A 4 flavor symmetry. We demonstrate how the exact tri-bimaximal mixing pattern is perturbed due to active-sterile mixing by analyzing 1 + 3 case in detail. We also show the implication of eV scale sterile-like neutrino on various observables in neutrino oscillation experiments and the effective mass in neutrinoless double beta decay. Another interesting feature of the model is that one of three exotic fermions is required to explain eV scale phenomena, while other two fermions form stable dark matter candidates and their total relic density satisfy the observed 3σ limit of Planck data. We constrain the gauge parameters associated with U (1) gauge extension, using relic density and collider bounds.

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Impact of an eV-mass sterile neutrino on the neutrinoless double-beta decays: A Bayesian analysis

Cited by 15 publications

References 109 publications

Towards the meV limit of the effective neutrino mass in neutrinoless double-beta decays *

Towards the meV limit of the effective neutrino mass in neutrinoless double-beta decays *

Effective neutrino masses in KATRIN and future tritium beta-decay experiments

Neutrino phenomenology and dark matter in an $$A_4$$ flavour extended $$B-L$$ model

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