Boomerang mechanism explaining the excess radio background
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912643903651840 |
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| author | Dev, Bhupal Di Bari, Pasquale Martinez-Soler, Ivan Roshan, Rishav |
| author_facet | Dev, Bhupal Di Bari, Pasquale Martinez-Soler, Ivan Roshan, Rishav |
| contents | We propose a {\em boomerang mechanism} for the explanation of the excess radio background detected by ARCADE. In an early stage, at a temperature $T \sim 100\,{\rm keV}$, 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 photon, mixed with photon, 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_03441 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Boomerang mechanism explaining the excess radio background Dev, Bhupal Di Bari, Pasquale Martinez-Soler, Ivan Roshan, Rishav High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics We propose a {\em boomerang mechanism} for the explanation of the excess radio background detected by ARCADE. In an early stage, at a temperature $T \sim 100\,{\rm keV}$, 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 photon, mixed with photon, 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. |
| title | Boomerang mechanism explaining the excess radio background |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2509.03441 |