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000473969 0247_ $$2arXiv$$aarXiv:2011.06519
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000473969 088__ $$2arXiv$$aarXiv:2011.06519
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000473969 1001_ $$0P:(DE-H253)PIP1083076$$aDepta, Paul Frederik$$b0$$eCorresponding author
000473969 245__ $$aUpdated BBN constraints on electromagnetic decays of MeV-scale particles
000473969 260__ $$aLondon$$bIOP$$c2021
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000473969 500__ $$aJCAP 04, 011 (2021). 26 pages, 11 figures, inverse decays; v2: minor changes, conclusions unchanged, matches published version
000473969 520__ $$aIn this work, we revise and update model-independent constraints from Big Bang Nucleosynthesis on MeV-scale particles ϕ which decay into photons and/or electron-positron pairs. We use the latest determinations of primordial abundances and extend the analysis in [1] by including all spin-statistical factors as well as inverse decays, significantly strengthening the resulting bounds in particular for small masses. For a very suppressed initial abundance of ϕ, these effects become ever more important and we find that even a pure `freeze-in' abundance can be significantly constrained. In parallel to this article, we release the public code which numerically solves the reaction network necessary to evaluate the effect of photodisintegration on the final light element abundances. As an interesting application, we re-evaluate a possible solution of the lithium problem due to the photodisintegration of beryllium and find that e.g. an ALP produced via freeze-in can lead to a viable solution.
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000473969 536__ $$0G:(EU-Grant)638528$$aNewAve - New avenues towards solving the dark matter puzzle (638528)$$c638528$$fERC-2014-STG$$x1
000473969 536__ $$0G:(GEPRIS)390833306$$aDFG project 390833306 - EXC 2121: Quantum Universe (390833306)$$c390833306$$x2
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000473969 650_7 $$2INSPIRE$$anucleosynthesis: big bang
000473969 650_7 $$2INSPIRE$$aelectromagnetic decay
000473969 650_7 $$2INSPIRE$$aelectron positron
000473969 650_7 $$2INSPIRE$$asuppression
000473969 650_7 $$2INSPIRE$$aberyllium
000473969 650_7 $$2INSPIRE$$anetwork
000473969 650_7 $$2INSPIRE$$alithium
000473969 650_7 $$2INSPIRE$$aphoton: energy
000473969 650_7 $$2INSPIRE$$aenergy dependence
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000473969 7001_ $$0P:(DE-H253)PIP1032760$$aHufnagel, Marco$$b1
000473969 7001_ $$0P:(DE-H253)PIP1022003$$aSchmidt-Hoberg, Kai$$b2$$udesy
000473969 773__ $$0PERI:(DE-600)2104147-7$$a10.1088/1475-7516/2021/04/011$$gVol. 04, no. 04, p. 011 -$$n04$$p011$$tJournal of cosmology and astroparticle physics$$v04$$x1475-7508$$y2021
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