Boomerang mechanism explaining the excess radio background

Abstract

We propose a boomerang mechanism for the explanation of the excess radio background detected by ARCADE 2. In an early stage of the Universe, at a temperature $T$ in the range $\sim 0.1\mathrm{keV}$--$1\mathrm{MeV}$, a fraction of relic neutrinos is resonantly converted into dark neutrinos by mixing induced by a pre-existing lepton asymmetry. Dark neutrinos decay much later into a dark-standard photon state and a dark fermion, with a lifetime longer than the age of the Universe, as required by a solution to the excess radio background. This scenario circumvents the upper bound on the neutrino magnetic moment but still implies a testable lower bound.

9 pages, 4 figures; v3: matches version published in PRD;

References in corpus (23)

• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Dark photon limits: a handbook
• Results from the Baksan Experiment on Sterile Transitions (BEST)
• Microwave Background Constraints on Mixing of Photons with Hidden Photons
• Pseudo-Dirac Neutrinos in the New Standard Model
• Reconciling the CAST and PVLAS Results
• Indications for a Nonzero Lepton Asymmetry from Extremely Metal-Poor Galaxies
• Naturally Light Dirac and Pseudo-Dirac Neutrinos from Left-Right Symmetry
• SN1987A still shining: A Quest for Pseudo-Dirac Neutrinos
• Soft logarithms in processes with heavy quarks
• Neutrino Electromagnetic Properties
• Revisiting pseudo-Dirac neutrino scenario after recent solar neutrino data
• Probing Pseudo-Dirac Neutrinos with Astrophysical Sources at IceCube
• A search for an eV-scale sterile neutrino using improved high-energy ${\nu }_{\mu }$ event reconstruction in IceCube
• DUNE potential as a New Physics probe
• $pp$ Solar Neutrinos at DARWIN
• Constraining super-light sterile neutrinos at Borexino and KamLAND
• Relic neutrino decay solution to the excess radio background
• Pseudo-Dirac Neutrinos and Relic Neutrino Matter Effect on the High-energy Neutrino Flavor Composition
• Dual-Baseline Search for Active-to-Sterile Neutrino Oscillations in NOvA
• Constraining the pseudo-Dirac nature of neutrinos using astrophysical neutrino flavor data
• A Large Twist Limit for Any Operator
• The optical system of the Tenerife Microwave Spectrometer: a window for observing the 10-20 GHz sky spectra