PeV scale Supersymmetry breaking and the IceCube neutrino flux

Abstract

The observation of very high energy neutrino events at IceCube has grasped a lot of attention in the fields of both astrophysics and particle physics. It has been speculated that these high energy neutrinos might originate either from purely conventional astrophysical sources or from the late decay of a super heavy (PeV scale) dark matter (DM) particle. In order for decaying DM to be a dominant source of the IceCube high-energy neutrinos, it would require an unusually suppressed value of the coupling of DM to neutrinos. We attempt to explain this small coupling in the context of an $R$-parity conserving minimal supergravity model which has right-handed neutrino superfields. With the main assumptions of super-partner masses at the PeV scale and also a reheating temperature not much larger than the PeV scale, we find in our model several natural order-of-magnitude "miracles", (i) the gravitino is produced via freeze-in as a DM candidate with the correct relic density (ii) the right-handed (RH) sneutrino makes up only a tiny fraction ($10^{-6})$, of the present day energy density of the universe, yet its decay lifetime to the gravitino and neutrinos is such that it naturally predicts the right order-of-magnitude for the IceCube neutrino flux. The long lifetime of the RH sneutrino is explained by the existence of a global $R$-symmetry which is only broken due to supersymmetry breaking effects. Our model also predicts a flux of 100 TeV gamma rays from the decaying RH sneutrino which are within the current observational constraints.

v2: 34 pages, 6 figures, Journal version (published in JHEP)

References in corpus (11)

• The spectrum of isotropic diffuse gamma-ray emission between 100 MeV and 820 GeV
• General Gauge Mediation
• Star-forming galaxies as the origin of diffuse high-energy backgrounds: Gamma-ray and neutrino connections, and implications for starburst history
• Implications of Supersymmetry Breaking with a Little Hierarchy between Gauginos and Scalars
• IceCube events and decaying dark matter: hints and constraints
• Right-handed Sneutrinos as Nonthermal Dark Matter
• Diffuse Gamma Rays from the Galactic Plane: Probing the "GeV Excess" and Identifying the "TeV Excess"
• Diffuse neutrinos from extragalactic supernova remnants: Dominating the 100 TeV IceCube flux
• Probing decaying heavy dark matter with the 4-year IceCube HESE data
• Beyond the standard seesaw: neutrino masses from Kahler operators and broken supersymmetry
• Dark matter gamma-ray line searches toward the Galactic Center halo with H.E.S.S. I

Cited by in corpus (13)

• A Combined Astrophysical and Dark Matter Interpretation of the IceCube HESE and Throughgoing Muon Events
• Update on decaying and annihilating heavy dark matter with the 6-year IceCube HESE data
• Interactions of Astrophysical Neutrinos with Dark Matter: A model building perspective
• Tsallis cosmology and its applications in dark matter physics with focus on IceCube high-energy neutrino data
• Constraints on neutrino speed, weak equivalence principle violation, Lorentz invariance violation, and dual lensing from the first high-energy astrophysical neutrino source TXS 0506+056
• Signature of light sterile neutrinos at IceCube
• Neutrinophilic Dark Matter in the epoch of IceCube and Fermi-LAT
• Domain walls and CP violation with left right supersymmetry:implications for leptogenesis and electron EDM
• Kaniadakis entropy-based characterization of IceCube PeV neutrino signals
• Probing self-interacting ultrahigh-energy neutrinos with the cosmic 21-cm signal
• Right-handed sneutrino and gravitino multicomponent dark matter in light of neutrino detectors
• LHAASO Galactic Plane $\gamma$-rays Strongly Constrain Heavy Dark Matter
• Search for dark matter using sub-PeV $\mathbf{\gamma }$-rays observed by Tibet AS${}_{\mathbf{\gamma }}$