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@ARTICLE{Bianco:625915,
      author       = {Bianco, Sara and Depta, Paul Frederik and Frerick, Jonas
                      and Hambye, Thomas and Hufnagel, Marco and Schmidt-Hoberg,
                      Kai},
      title        = {{P}hoto- and {H}adrodisintegration constraints on massive
                      relics decaying into neutrinos},
      reportid     = {PUBDB-2025-01239, DESY-25-056. arXiv:2505.01492.
                      ULB-TH/25-03},
      year         = {2025},
      note         = {67 pages, 19 figures},
      abstract     = {We perform a detailed study of the cosmological constraints
                      on the decay of a relic particle $\phi$ into neutrinos,
                      $\phi \rightarrow \nu \bar{\nu}$, in particular those
                      arising from the observed light-element abundances in the
                      early Universe. We focus on the late-time disintegration of
                      the light elements previously synthesised during BBN.
                      Several processes are relevant, including final-state
                      radiation associated with the decay, as well as subsequent
                      interactions of the injected neutrinos with the thermal
                      background neutrinos or between themselves. All processes
                      generically contribute to the production of electromagnetic
                      and often also hadronic material and may therefore induce
                      late-time photodisintegration and hadrodisintegration
                      reactions, i.e.~the destruction of light elements that have
                      previously been formed during BBN. Here, we examine this
                      scenario with a Monte-Carlo inspired probabilistic approach
                      rather than Boltzmann techniques, taking into account all of
                      these different reactions as well as their interplay. We
                      find the resulting constraints to be very significant,
                      covering a broad range of previously unexplored masses and
                      lifetimes of the relic source particle.},
      cin          = {T},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe
                      (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2505.01492},
      howpublished = {arXiv:2505.01492},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2505.01492;\%\%$},
      doi          = {10.3204/PUBDB-2025-01239},
      url          = {https://bib-pubdb1.desy.de/record/625915},
}