Global Constraints on a Heavy Neutrino

By A. Gouvea, A. Kobach. 2015

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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 $|U_{e4}|^2$, $|U_{\mu4}|^2$, and $|U_{\tau4}|^2$.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f3b2d4fae130a963452b0d4a6c3d5ca71db58012

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In Nuclear and High Energy Physics

Citations in the corpus

Sterile neutrino Dark Matter (2018, background): “ it relies on assumptions about other possible sources of LNV. The impact of DM sterile neutrinos on most other observables that are commonly used to indirectly test low scale seesaw models (see e.g. [149,150] and references therein) is insignicant due to the strong constraints on the mixing angles ”
Neutrino non-standard interactions: A status report (2019, background): “The region above the red curve is excluded at 99% CL by meson decays, the muon decay Michel spectrum and lepton universality [112,176].”
Lepton Number Violation: Seesaw Models and Their Collider Tests (2017, background): “For investigations into EW constraints on heavy neutrinos, see del Águila et al. [88], Antusch and Fischer [89], de Gouvêa and Kobach [90], and Fernandez-Martinez et al. [91].”