% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @INPROCEEDINGS{Bianco:619158, author = {Bianco, Sara and Schmidt-Hoberg, Kai and Frerick, Jonas and Hufnagel, Marco and Depta, Paul Frederik and Thomas, Hambye}, title = {{BBN} photodisintegration limitsfrom neutrino injections}, reportid = {PUBDB-2024-07416}, year = {2024}, abstract = {Constraints on dark sector particles decaying into neutrinos typically focus on their impact on the effective number of relativistic species in the early Universe. However, for heavy relics with longer lifetimes, constraints mainly arise from the photo-disintegration of primordial abundances. The high-energy neutrinos injected by the decay can interact with both the thermal neutrinos and other high-energy neutrinos. Among these interactions, annihilations into electromagnetic particles will induce an electromagnetic cascade that affects the abundances of the already formed light elements via photo-disintegration. In this work, we present constraints on these dark sector particles. Specifically, we implement a Monte Carlo code to simulate the electromagnetic cascade, instead of solving the full set of Boltzmann equations. We find improved bounds on the particle's lifetime, abundance, and mass.}, month = {Jul}, date = {2024-07-01}, organization = {Invisibles24 Workshop, Bologna (Italy), 1 Jul 2024 - 5 Jul 2024}, cin = {T}, cid = {I:(DE-H253)T-20120731}, pnm = {611 - Fundamental Particles and Forces (POF4-611) / HIDDeN - Hunting Invisibles: Dark sectors, Dark matter and Neutrinos (860881)}, pid = {G:(DE-HGF)POF4-611 / G:(EU-Grant)860881}, experiment = {EXP:(DE-MLZ)NOSPEC-20140101}, typ = {PUB:(DE-HGF)24}, url = {https://bib-pubdb1.desy.de/record/619158}, }