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

被引：14

作者：

Huang, Guo-yuan ^{[1
,2
]}

Zhou, Shun ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

来源：

NUCLEAR PHYSICS B | 2019年 / 945卷

基金：

中国国家自然科学基金;

关键词：

INFERENCE; EFFICIENT; SEARCH;

D O I：

10.1016/j.nuclphysb.2019.114691

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

To quantitatively assess the impact of an eV-mass sterile neutrino on the neutrinoless double-beta (0 nu beta beta) decays, we calculate the posterior probability distribution of the relevant effective neutrino mass vertical bar m(ee)'vertical bar in the (3+1)nu mixing scenario, following the Bayesian statistical approach. The latest global-fit analysis of neutrino oscillation data, the cosmological bound on the sum of three active neutrino masses from Planck, and the constraints from current 0 nu beta beta decay experiments are taken into account in our calculations. Based on the resultant posterior distributions, we find that the average value of the effective neutrino mass is shifted from (vertical bar m(ee)vertical bar) over bar = 3.37 x 10(-3) eV (or 7.71 x 10(-3)eV) in the standard 3 nu mixing scenario to (vertical bar m(ee)'vertical bar) over bar = 2.54 x 10(-2) eV (or 2.56 x 10(-2) eV) in the (3+1)v mixing scenario, with the logarithmically uniform prior on the lightest neutrino mass (or on the sum of three active neutrino masses). Therefore, a null signal from the future 0 nu beta beta decay experiment with a sensitivity to vertical bar m(ee)'vertical bar approximate to O(10(-2)) eV will be able to set a very stringent constraint on the sterile neutrino mass and the active-sterile mixing angle. (C) 2019 The Authors. Published by Elsevier B.V.

引用

页数：14

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