Effective comparison of neutrino-mass models

Abstract

New physics in the lepton sector may account for neutrino masses, affect electroweak precision observables, induce charged-lepton flavour violation, and shift dipole moments. The low-energy predictions of different models are most conveniently compared within the formalism of effective field theory. To illustrate the benefits of this approach, we derive the Wilson coefficients for a set of representative models: the fermionic seesaw mechanisms (type I and III), the Zee model, and a minimal leptoquark model. In each case, the Weinberg and the dipole operators have qualitatively different origins. In parallel, we present the model-independent constraints on the Wilson coefficients coming from various lepton observables. We then show that it becomes straightforward to understand the allowed parameter space for each model, and to discriminate between them. The Zee and leptoquark models are suitable to address the muon $g-2$ anomaly. We also confront the models with the anomalies in the W-boson mass and semileptonic $B$-meson decays.

v2: Version accepted by PRD, bounds from the W-boson mass updated to include the recent CDF II measurement, minor clarifications added, more references and fewer typos

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Cited by in corpus (12)

• Neutrino seesaw models at one-loop matching: Discrimination by effective operators
• Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
• Doubly Charged Higgs Boson Production at Hadron Colliders II: A Zee-Babu Case Study
• One-loop Matching of Scotogenic Model onto Standard Model Effective Field Theory up to Dimension 7
• Complete One-loop Structure of the Type-(I+II) Seesaw Effective Field Theory
• Complete One-loop Renormalization-group Equations in the Seesaw Effective Field Theories
• Charged lepton flavor violating processes in the Grimus-Neufeld model
• $W$-Boson Mass Anomaly from a General $SU(2{)}_L$ Scalar Multiplet
• Two portals to GeV sterile neutrinos : dipole versus mixing
• A forgotten fermion: the hypercharge -3/2 doublet, its phenomenology and connections to dark matter
• Constraints on the parameters of the neutrino extension of the Standard Model
• Riding the Seesaw: What Higgsstrahlung May Reveal about Massive Neutrinos