Big Bang Nucleosynthesis hunts chameleon dark matter
Sign Up to like & getrecommendations! Published in 2020 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2020)155
Abstract: We study the chameleon field dark matter, dubbed scalaron , in F ( R ) gravity in the Big Bang Nucleosynthesis (BBN) epoch. With an R 2 -correction term required to solve the singularity problem… read more here.
Keywords: bang nucleosynthesis; dark matter; big bang;
Dynamical screening effects on big bang nucleosynthesis
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/11/017
Abstract: A moving ion in plasma creates a deformed electric potential depending on the ion velocity, which leads to the distinct screening effect compared to the standard static Salpeter formula. In this paper, adopting the test… read more here.
Keywords: big bang; dynamical screening; effects big; bang nucleosynthesis ... See more keywords
Big bang nucleosynthesis constraints on higher-order modified gravities
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.105.084010
Abstract: We use Big Bang Nucleosynthesis (BBN) data in order to impose constraints on higher-order modified gravity, and in particular on: (i) f ( G ) Gauss-Bonnet gravity, and f ( P ) cubic gravities, arising… read more here.
Keywords: constraints higher; order; cid; cid cid ... See more keywords
Measurement of d+^{7}Be Cross Sections for Big-Bang Nucleosynthesis.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.122.182701
Abstract: The cross sections of nuclear reactions between the radioisotope ^{7}Be and deuterium, a possible mechanism of reducing the production of mass-7 nuclides in big-bang nucleosynthesis, were measured at center-of-mass energies between 0.2 and 1.5 MeV. The… read more here.
Keywords: bang nucleosynthesis; big bang; cross sections; cross ... See more keywords
The Neutron Mean Life and Big Bang Nucleosynthesis
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DOI: 10.3390/universe9040183
Abstract: We explore the effect of neutron lifetime and its uncertainty on standard big bang nucleosynthesis (BBN). BBN describes the cosmic production of the light nuclides, 1H, D, 3H+3He, 4He, and 7Li+7Be, in the first minutes… read more here.
Keywords: bang nucleosynthesis; big bang; mean life; neutron ... See more keywords