Results 21 to 30 of about 21,010 (191)

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.
doaj   +1 more source

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, Hilary Kennedy, Benjamin M. Butler, Sarah J. Day, Emmal Safi, Aneurin Evans   +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, Taishi Katsuragawa, Shinya Matsuzaki, Taotao Qiu   +3 more
doaj   +1 more source

Reheating Temperature and Gauge Mediation Models of Supersymmetry Breaking [PDF]

, 2009
For supersymmetric theories with gravitino dark matter, the maximal reheating temperature consistent with big bang nucleosynthesis bounds arises when the physical gaugino masses are degenerate.
A. Rizzi ., B. Bajc, C. Cheung, C.F. Berger, CDF collaboration, D.G. Cerdeno, D.G. Cerdeno, G. Hiller, G.F. Giudice, J.A. Bagger, J.L. Feng, J.R. Ellis, James D Wells, K. Jedamzik, K. Jedamzik, K.-Y. Choi, Krzysztof Turzyński, L. Covi, L. Roszkowski, L.M. Carpenter, LEP2 SUSY working group, M. Buican, M. Ratz, Marek Olechowski, S. Antusch, S. Bailly, Stefan Pokorski, WMAP collaboration, Z. Lalak   +28 more
core   +2 more sources

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
doaj   +1 more source

Non-universal scalar-tensor theories and big bang nucleosynthesis [PDF]

, 2008
We investigate the constraints that can be set from big-bang nucleosynthesis on two classes of models: extended quintessence and scalar-tensor theories of gravity in which the equivalence principle between standard matter and dark matter is violated.
Alain Coc, B. D. Fields, C. Will, C. M. Will, Elisabeth Vangioni, I. I. Shapiro, J.-P. Uzan, J. D. Barrow, J. D. Barrow, Jean-Philippe Uzan, K. Arai, Keith A. Olive, M. Fierz   +12 more
core   +3 more sources

My Name Is Forrest Mozer

, 2022
Perspectives of Earth and Space Scientists, Volume 3, Issue 1, December 2022.
Forrest Mozer
wiley   +1 more source

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
doaj   +1 more source

Primordial big bang nucleosynthesis and generalized uncertainty principle

European Physical Journal C: Particles and Fields, 2021
The Generalized Uncertainty Principle (GUP) naturally emerges in several quantum gravity models, predicting the existence of a minimal length at Planck scale.
Giuseppe Gaetano Luciano
doaj   +1 more source