Impact of neutrino properties and dark matter on the primordial Lithium production

Makki, Tahani R.; El Eid, Mounib F.; Mathews, Grant J.

doi:10.1142/s0218301319500654

Impact of neutrino properties and dark matter on the primordial Lithium production

Journal Article · 01 August 2019 · International Journal of Modern Physics E

DOI:https://doi.org/10.1142/s0218301319500654· OSTI ID:1610297

Makki, Tahani R. ^[1]; El Eid, Mounib F. ^[1]; Mathews, Grant J. ^[2]

Department of Physics, American University of Beirut, Lebanon
Department of Physics, Center for Astrophysics, University of Notre Dame, USA

The light elements and their isotopes were produced during standard big bang nucleosynthesis (SBBN) during the first minutes after the creation of the universe. Comparing the calculated abundances of these light species with observed abundances, it appears that all species match very well except for lithium (⁷Li) which is overproduced by the SBBN. This discrepancy is rather challenging for several reasons to be considered on astrophysical and on nuclear physics ground, or by invoking nonstandard assumptions which are the focus of this paper. In particular, we consider a variation of the chemical potentials of the neutrinos and their temperature. In addition, we investigated the effect of dark matter on⁷Li production. We argue that including nonstandard assumptions can lead to a significant reduction of the⁷Li abundance compared to that of SBBN. This aspect of lithium production in the early universe may help to resolve the outstanding cosmological lithium problem.

Research Organization:: University of Notre Dame, IN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02-95ER40934

OSTI ID:: 1610297

Journal Information:: International Journal of Modern Physics E, Vol. 28, Issue 08; ISSN 0218-3013

Publisher:: World Scientific

Country of Publication:: United States

Language:: English

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