Heavy Neutral Leptons -- Advancing into the PeV domain

Abstract

Heavy neutral leptons (HNLs) are hypothetical particles able to explain neutrino oscillations and provide a mechanism for generating the baryon asymmetry of the Universe. Quantum corrections due to such particles give rise to flavor violating processes in the charged lepton sector. Based on the fact that these corrections grow with HNL masses, we improve existing constraints by orders of magnitude in mass and mixing angle. This allows us to probe part of the parameter space of leptogenesis with multi-TeV HNLs. We also show that one will be able to infer HNL parameters in a significant portion of the parameter space for TeV-PeV masses if charged lepton flavor violating signals are detected.

29 pages, 11 figures. Updated to JHEP version

References in corpus (13)

• Leptogenesis
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Low energy effects of neutrino masses
• Minimal Flavour Seesaw Models
• A possible symmetry of the $\nu$MSM
• Heavy neutrino signals at large hadron colliders
• Heavy Majorana Neutrinos from $W\gamma$ Fusion at Hadron Colliders
• Lepton Flavour Violation and theta(13) in Minimal Resonant Leptogenesis
• The Little Review on Leptogenesis
• Majorana Neutrinos in Same-Sign $W^{\pm }{W}^{\pm }$ Scattering at the LHC: Breaking the TeV Barrier
• Heavy neutral leptons and high-intensity observables
• Measurements of $\mu \to 3e$ Decay with Polarised Muons as a Probe of New Physics
• Tests of Low-Scale Leptogenesis in Charged Lepton Flavour Violation Experiments

Cited by in corpus (6)

• Measuring lepton number violation in heavy neutral lepton decays at the future muon collider
• ALPs and HNLs at LHC and Muon Colliders: Uncovering New Couplings and Signals
• Modular-symmetry-protected seesaw
• Tree-level unitarity constraints on heavy neutral leptons
• Revisiting lepton flavor violation: $\tau$ and meson decays
• Constraints on the parameters of the neutrino extension of the Standard Model