Improved Constraints on Sterile Neutrinos in the MeV to GeV Mass Range

Abstract

Improved upper bounds are presented on the coupling $|U_{e4}{|}^2$ of an electron to a sterile neutrino ${\nu }_4$ from analyses of data on nuclear and particle decays, including superallowed nuclear beta decays, the ratios $R_{e/\mu }^{(\pi )}=BR({\pi }^{+}\to e^{+}{\nu }_e)/BR({\pi }^{+}\to {\mu }^{+}{\nu }_{\mu })$, $R_{e/\mu }^{(K)}$, $R_{e/\tau }^{(D_s)}$, and $B_{e2}^{+}$ decay, covering the mass range from MeV to GeV.

6 pages, latex, 1 eps file

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Cited by in corpus (43)

• Sterile Neutrinos
• The Present and Future Status of Heavy Neutral Leptons
• Where Are We With Light Sterile Neutrinos?
• Constraints on Sterile Neutrinos in the MeV to GeV Mass Range
• Direct Measurements of Neutrino Mass
• An Extended Analysis of Heavy Neutral Leptons during Big Bang Nucleosynthesis
• A frequentist analysis of three right-handed neutrinos with GAMBIT
• GeV-scale neutrinos: interactions with mesons and DUNE sensitivity
• The Hubble tension and a renormalizable model of gauged neutrino self-interactions
• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• Neutrino self-interactions and XENON1T electron recoil excess
• Decaying Sterile Neutrinos and the Short Baseline Oscillation Anomalies
• Heavy sterile neutrino emission in core-collapse supernovae: Constraints and signatures
• New constraints on Heavy Neutral Leptons from Super-Kamiokande data
• Update on $|V_{us}|$ and $|V_{us}/V_{ud}|$ from semileptonic kaon and pion decays
• Heavy Neutrino searches through Double-Bang Events at Super-Kamiokande, DUNE, and Hyper-Kamiokande
• An Active-to-Sterile Neutrino Transition Dipole Moment and the XENON1T Excess
• Possible Hints of Sterile Neutrinos in Recent Measurements of the Hubble Parameter
• Three-Body Decays of Heavy Dirac and Majorana Fermions
• New method for calculating electromagnetic effects in semileptonic beta-decays of mesons
• MeV-scale Seesaw and Leptogenesis
• Sensitivity bounds on heavy neutrino mixing $|U_{\mu N}{|}^2$ and $|U_{\tau N}{|}^2$ from LHCb upgrade
• Constraints on light singlet fermion interactions from coherent elastic neutrino-nucleus scattering
• Radiative corrections to semileptonic beta decays: Progress and challenges
• Z-Boson Decays into Majorana or Dirac (Heavy) Neutrinos
• Neutrino Masses and Mixing in Models with Large Extra Dimensions and Localized Fermions
• Probing sterile neutrino in $B$ ($D$) meson decays at Belle II (BESIII)
• Upper limits on branching ratios of the lepton-flavor-violating decays $\tau \to \ell \gamma \gamma$ and $\tau \to \ell X$
• Searching for new physics at $\mu \to e$ facilities with ${\mu }^{+}$ and ${\pi }^{+}$ decays at rest
• A 17 MeV pseudoscalar and the LSND, MiniBooNE and ATOMKI anomalies
• Long-Lived Particles and the Quiet Sun
• Left-Right Symmetric Model without Higgs Triplets
• Measurement of $B^{+}\to {\tau }^{+}{\nu }_{\tau }$ branching fraction with a hadronic tagging method at Belle II
• MeV Sterile Neutrino in light of the Cabibbo-Angle Anomaly
• Theoretical point of view on Cabibbo angle anomaly
• Prospects for Heavy Neutral Lepton Searches at Short and Medium Baseline Reactor Experiments
• Probing Solar Heavy Neutrinos with Heliospheric Electrons
• Dark Matter and Neutrino Masses in a Portalino-like Model
• Indirect search of Heavy Neutral Leptons using the DUNE Near Detector
• Electron Mass Singularities in Semileptonic Kaon Decays
• Search for Sterile Neutrinos with CUPID-0
• Testing Non-Standard Neutrinos in Purely Leptonic Lepton Decays
• Characterizing Heavy Neutral Fermions via their Decays