Beta and Neutrinoless Double Beta Decays with KeV Sterile Fermions

Abstract

Motivated by the capability of the KATRIN experiment to explore the existence of KeV neutrinos in the $[1-18.5]$ KeV mass range, we explore the viability of minimal extensions of the Standard Model involving sterile neutrinos (namely the 3 + $N$ frameworks) and study their possible impact in both the beta energy spectrum and the neutrinoless double beta decay effective mass, for the two possible ordering cases for the light neutrino spectrum. We also explore how both observables can discriminate between motivated low-scale seesaw realizations involving KeV sterile neutrinos. Our study concerns the prospect of a Type-I seesaw with two right-handed neutrinos, and a combination of the inverse and the linear seesaws where the Standard Model is minimally extended by two quasi-degenerate sterile fermions. We also discuss the possibility of exploring the latter case searching for double-kinks in KATRIN.

29 pages, 18 figures. References added. Published version

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Cited by in corpus (27)

• Sterile Neutrino Dark Matter
• Neutrinoless double beta decay versus other probes of heavy sterile neutrinos
• Two-Neutrino Double Beta Decay with Sterile Neutrinos
• Interference effects in LNV and LFV semileptonic decays: the Majorana hypothesis
• A 3-3-1 model with low scale seesaw mechanisms
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• Tritium beta decay with additional emission of new light bosons
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• A Survey of Neutrino Flavor Models and the Neutrinoless Double Beta Decay Funnel
• Probing Beyond the Standard Model Physics with Double-beta Decays
• Testing electroweak scale seesaw models at $e^{-}\gamma$ and $\gamma \gamma$ colliders
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• The background model of the CUPID-Mo $0\nu \beta \beta$ experiment
• Phenomenology of keV scale sterile neutrino dark matter with $S_4$ flavor symmetry
• Minimal inverse-seesaw mechanism with Abelian flavour symmetries
• Flavour and CP symmetries in the inverse seesaw
• Sterile neutrinos, $0\nu \beta \beta$ decay and the W-boson mass anomaly in a Flipped $SU(5)$ from F-theory
• Phenomenology of $keV$ sterile neutrino in minimal extended seesaw
• Neutrino masses and mixing in Minimal Inverse Seesaw using $A_4$ modular symmetry
• CP violations in a predictive $A_4$ symmetry model
• Neutrino Phenomenology and Dark matter in an $A_4$ flavour extended B-L model
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• Scintillation properties of $({\mathrm{Zn}}_{0.9}{\mathrm{Pb}}_{0.1})({\mathrm{W}}_{0.9}{\mathrm{Mo}}_{0.1}){\mathrm{O}}_4$ and $({\mathrm{Zn}}_{0.9}{\mathrm{Cd}}_{0.1})({\mathrm{W}}_{0.9}{\mathrm{Mo}}_{0.1}){\mathrm{O}}_4$ mixed crystals