Global constraints on a heavy neutrino

被引：127

作者：

de Gouvea, Andre ^{[1
]}

Kobach, Andrew ^{[1
,2
]}

机构：

[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 03期

关键词：

BETA-SPECTRUM; MAJORANA NEUTRINOS; GENERAL-THEORY; W BOSONS; SEARCH; LIMITS; ADMIXTURE; LEPTONS; DECAYS; MASSES;

D O I：

10.1103/PhysRevD.93.033005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We estimate constraints on the existence of a heavy, mostly sterile neutrino with mass between 10 eV and 1 TeV. We improve upon previous analyses by performing a global combination and expanding the experimental inputs to simultaneously include tests for lepton universality, lepton-flavor-violating processes, electroweak precision data, dipole moments, and neutrinoless double beta decay. Assuming the heavy neutrino and its decay products are invisible to detection, we further include, in a self-consistent manner, constraints from direct kinematic searches, the kinematics of muon decay, cosmology, and neutrino oscillations, in order to estimate constraints on the values of vertical bar U-e4 vertical bar(2), vertical bar U-mu 4 vertical bar(2), and vertical bar U-tau 4 vertical bar(2).

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