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Big-bang nucleosynthesis with sub-GeV massive decaying particles

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arxiv 2006.14803 v1 pith:QSKXFXPD submitted 2020-06-26 hep-ph astro-ph.CO

Masahiro Kawasaki , Kazunori Kohri , Takeo Moroi , Kai Murai , Hitoshi Murayama This is my paper · ORCID
classification hep-phastro-ph.CO
keywords big-bangdecayingmassivenucleosynthesissub-gevabundancesattentionbounds
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abstract

We consider the effects of the injections of energetic photon and electron (or positron) on the big-bang nucleosynthesis. We study the photodissociation of light elements in the early Universe paying particular attention to the case that the injection energy is sub-GeV and derive upper bounds on the primordial abundances of the massive decaying particle as a function of its lifetime. We also discuss a solution of the $^7$Li problem in this framework.

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