Results 11 to 20 of about 28,372 (160)
BBN constraints on universally-coupled ultralight scalar dark matter
Journal of High Energy Physics, 2020 Ultralight scalar dark matter can interact with all massive Standard Model particles through a universal coupling. Such a coupling modifies the Standard Model particle masses and affects the dynamics of Big Bang Nucleosynthesis. We model the cosmological
Sergey Sibiryakov +2 more
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The Neutron Mean Life and Big Bang Nucleosynthesis
Universe, 2023 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 of cosmic time.
Tsung-Han Yeh +2 more
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The long-standing connection of BBN and Indirect measurements: The 3He(n,p)3H reaction at Big Bang energies [PDF]
EPJ Web of Conferences, 2023 Nuclear reactions play a key role in the framework of the Big Bang Nucleosynthesis. A network of 12 principal reactions has been identified as the main path which drives the elemental nucleosynthesis in the first twenty minutes of the history of the ...
Pizzone R.G., Spampinato C.
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New worlds, new chemistry, new ceramics
International Journal of Ceramic Engineering &Science, Volume 3, Issue 6, Page 252-266, November 2021., 2021 Space missions have documented the chemical diversity and complexity of planets and moons in our own solar system. Astronomers have found thousands of exoplanets orbiting other stars in our galaxy, whose diversity implies immense chemical, ceramic, geological, and mineralogical complexity.
Alexandra Navrotsky, Megan Householder
wiley +1 more source
Laboratory exploration of mineral precipitates from Europa's subsurface ocean
Journal of Applied Crystallography, Volume 54, Issue 5, Page 1455-1479, October 2021., 2021 Precipitation experiments from a model Europan ocean solution subjected to fast and slow freezing suggest that the highly hydrated Na–Mg sulfate phase Na2Mg(SO4)2·16H2O is one of the lowest‐temperature mineral phases likely to be stable on Europa's surface and may therefore be astrobiologically significant.The precipitation of hydrated phases from a ...
Stephen P. Thompson +5 more
wiley +1 more source
Big Bang Nucleosynthesis hunts chameleon dark matter
Journal of High Energy Physics, 2020 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 for F (R) gravity, we first find that the scalaron dynamics is ...
Hua Chen +3 more
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Underground measurement at LUNA found no evidence for a low-energy resonance in the 6Li(p, γ)7Be reaction [PDF]
EPJ Web of Conferences, 2022 The 6Li(p,γ)7Be reaction is involved in all three main nucleosynthesis scenarios: Big Bang Nucleosynthesis, the interaction of cosmic rays with interstellar matter, and stellar nucleosynthesis.
Piatti Denise
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THE 2H(alpha, gamma)6LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS
Acta Polytechnica, 2013 The 2H(α, γ)6Li reaction is the leading process for the production of 6Li in standard Big Bang Nucleosynthesis. Recent observations of lithium abundance in metal-poor halo stars suggest that there might be a 6Li plateau, similar to the well-known Spite ...
Carlo Gustavino
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, 2022 Perspectives of Earth and Space Scientists, Volume 3, Issue 1, December 2022.
Forrest Mozer
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Big Bang Nucleosynthesis Constraints on f (T, TG) Gravity
Universe, 2022 We confront f(T,TG) gravity, with big bang nucleosynthesis (BBN) requirements. The former is obtained using both the torsion scalar, as well as the teleparallel equivalent of the Gauss–Bonnet term, in the Lagrangian, resulting to modified Friedmann ...
Petros Asimakis +3 more
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