Abstract
The standard Big-Bang model predicts the primordial abundances of \(^{2}\)H(D), \(^{3}\)He, \(^{4}\)He in excellent agreement with observations, except for \(^7\)Li that is overpredicted by a factor of about three. Despite many attempted solutions to this discrepancy using conventional nuclear physics over the past decades, the lithium enigma persists. Here we present an investigation of Big Bang nucleosynthesis (BBN) predictions when we adopt a non-extensive distribution to describe the velocity profile of the nuclides in the primordial plasma. We find excellent agreement between predicted and observed primordial abundances of D, \(^{4}\)He, \(^{7}\)Li for the case of \(1.069 \le q \le 1.082\), which indicates a possible new solution to the cosmological lithium problem.
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Acknowledgements
This work was financially supported by the Major State Basic Research Development Program of China (2016YFA0400503 ) and the the National Natural Science Foundation of China (Nos. 11705244, 11490562, 11135005, 11321064).
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Hou, S.Q. et al. (2019). Non-extensive Solution to Cosmological Lithium Problem. In: Formicola, A., Junker, M., Gialanella, L., Imbriani, G. (eds) Nuclei in the Cosmos XV. Springer Proceedings in Physics, vol 219. Springer, Cham. https://doi.org/10.1007/978-3-030-13876-9_7
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DOI: https://doi.org/10.1007/978-3-030-13876-9_7
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