{
  "id": "2406.19279",
  "version": "v1",
  "published": "2024-06-27T15:49:37.000Z",
  "updated": "2024-06-27T15:49:37.000Z",
  "title": "Probing self-interacting ultra-high-energy neutrinos with cosmic 21-cm signal",
  "authors": [
    "Mansi Dhuria",
    "Bishnu Gupta Teli"
  ],
  "comment": "13 pages, 5 figures",
  "categories": [
    "hep-ph",
    "astro-ph.CO"
  ],
  "abstract": "In this study, we investigate the constraints on secret self-interactions of neutrinos by examining the impact of radiative scattering of ultra-high-energy (UHE) neutrinos. These neutrinos are produced from the decay of superheavy dark matter and interact with the cosmic neutrino background (C$\\nu$B). We explore how these interactions influence the 21-cm hydrogen signal during the cosmic dark ages and cosmic dawn, periods relatively free from astrophysical uncertainties, providing a clearer signal for studying non-standard neutrino interactions. By analyzing the global brightness temperature measurements, we constrain the scattering cross-section of UHE self-interacting neutrinos, determining the coupling constant $g$ to be within $\\sim 10^{-4}$ to $\\sim 10^{-3}$ for neutrino energies in the PeV to EeV range. Interestingly, these constraints are more competitive than those from existing astrophysical and collider experiments. As future 21-cm experiments focus on measuring brightness temperature across a wide range of redshifts from the cosmic dark ages to reionization, using the epoch of 21-cm to probe neutrino properties could provide crucial insights into dark matter and neutrino physics.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-06-27T15:49:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "probing self-interacting ultra-high-energy neutrinos",
      "cosmic dark ages",
      "global brightness temperature measurements",
      "cosmic neutrino background",
      "superheavy dark matter"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}