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Quintessence and the Swampland: The Numerically Controlled Regime of Moduli Space

Fortschritte der Physik, Volume 70, Issue 4, April 2022., 2022
Abstract We provide a detailed discussion of the main theoretical and phenomenological challenges of quintessence model building in any numerically controlled regime of the moduli space of string theory. We argue that a working quintessence model requires a leading order non‐supersymmetric (near) Minkowski vacuum with an axionic flat direction.
Michele Cicoli, Francesc Cunillera, Antonio Padilla, Francisco G. Pedro   +3 more
wiley   +1 more source

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, Keith A. Olive, Brian D. Fields   +2 more
doaj   +1 more source

Density Perturbation and Cosmological Evolution in the Presence of Magnetic Field in f(R) Gravity Models

Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022
In this paper, we have investigated the density perturbations and cosmological evolution in the FLRW universe in the presence of a cosmic magnetic field, which may be assumed to mimic primordial magnetic fields. Such magnetic fields have sufficient strength to influence galaxy formation and cluster dynamics, thereby leaving an imprint on the CMB ...
Samarjit Chakraborty, Sarbari Guha, Cesar A. Vasconcellos   +2 more
wiley   +1 more source

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

Big-bang nucleosynthesis and gravitinos [PDF]

Physical Review D, 2008
27 pages, 16 ...
Kazunori Kohri, Masahiro Kawasaki, Masahiro Kawasaki, Akira Yotsuyanagi, Takeo Moroi   +4 more
openaire   +3 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