https://doi.org/10.1140/epjc/s10052-025-15089-7
Regular Article - Theoretical Physics
Possible explanation of primordial 7Li deficit
1
Department of Higher Mathematics, Dubna State University, Universitetskaya Str. 19, 141983, Dubna, Russia
2
Department of Physics, Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
3
Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Joliot-Curie St. 6, 141980, Dubna, Russia
Received:
22
August
2025
Accepted:
15
November
2025
Published online:
28
November
2025
A reduction mechanism of the theoretically predicted excessive abundance of 7Li via baryons evaporated by primordial black holes is suggested. It is shown that the fraction of 7Li with respect to the number density of baryons can be diminished down to the observed value via the process of 7Li transformation by neutron or proton capture. The created in this process 8Li or 8Be quickly decay into a pair of 4He nuclei.
© The Author(s) 2025
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