The KM3NeT 220 PeV event: a neutrino messenger from the grand unification scale?
Vernon Barger
hep-ph, astro-ph.HE
Submitted: 2026-07-12
License: http://creativecommons.org/licenses/by/4.0/
The gist: The 220 PeV neutrino KM3-230213A, in tension with IceCube and Auger unless narrow, admits a two-body reading: relic decay X to nu nu with m X about 4.4 times10 8 GeV.
Terminology
Abstract
The 220 PeV neutrino KM3-230213A, in tension with IceCube and Auger unless narrow, admits a two-body reading: relic decay X to nu nu with m X about 4.4 times10 8 GeV. Consistency with neutrino and gamma-ray bounds sets tau/f about 10 29 -- 10 30 s, lifetime over relic fraction. For a flavored 1S 0 onium, the operator scale lands in the Majorana-mass range of unified models: one Higgs insertion gives a singlet mediator, M/C 7 1/3 about 10 14 -- 10 16 GeV across the allowed relic fraction; two give the seesaw window; Dirac or Majorana neutrinos select the branch. We give the construction and its decisive tests.
Sources
- Search for Extremely-High-Energy Neutrinos and First Constraints on the Ultrahigh-Energy Cosmic-Ray Proton Fraction with IceCube
- Probing the origin of ultra-high-energy cosmic rays with neutrinos in the EeV energy range using the Pierre Auger Observatory
- Limits on point-like sources of ultra-high-energy neutrinos with the Pierre Auger Observatory
- Constraints on the diffuse flux of multi-PeV astrophysical neutrinos obtained with the Baikal Gigaton Volume Detector
- The ultra-high-energy event KM3-230213A within the global neutrino landscape
- On the potential cosmogenic origin of the ultra-high-energy event KM3-230213A
- A low-threshold ultrahigh-energy neutrino search with the Askaryan Radio Array
- A Comprehensive Diffuse Neutrino Search Using the Full Askaryan Radio Array
- KM3-230213A: An Ultra-High Energy Neutrino from a Year-Long Astrophysical Transient
- Super heavy dark matter origin of the PeV neutrino event: KM3-230213A
- Possible origin of the KM3-230213A neutrino event from dark matter decay
- Testing Heavy Dark Matter Decay as the Origin of KM3-230213A
- What KM3-230213A events may tell us about the neutrino mass and dark matter
- Constraining Super-Heavy Dark Matter with the KM3-230213A Neutrino Event
- Extending the Standard Model Effective Field Theory with the Complete Set of Dimension-7 Operators
- Dimension Seven Operators in Standard Model with Right handed Neutrinos
- Operators up to Dimension Seven in Standard Model Effective Field Theory Extended with Sterile Neutrinos
- The Family Group in Grand Unified Theories
- Complex Spinors and Unified Theories
- Planckian Interacting Massive Particles as Dark Matter
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